1400-1600 All in One i7 Build

Hey guys, I really would like some input on a new i7 build I'm putting together.

Purpose
I want this computer to be my all around computer. The three main things are gaming, video trans-coding, and HTPC machine.

Type of PC
1. I am planning to get the i7 to overclock it. I want my oc to be around 3.4-3.6. My main goal in the oc is to go as high as possible without changing the CPU voltage or at the very least a very minimal increase.
2. Silent PC. Some noise during gaming is fine, but I would still like a very quiet computer.
2. I want moderately the temperatures low/medium, mainly so I can get a good oc out of it.

Price Range/Purchase Date
Date: Sometime in September, I know that a month away, but I like to be prepared when I'm going to spend $1500+ on a new computer.
Price: 1400-1600 before taxes and shipping. I would prefer to be on the lower end of that, but its really what ever it takes to meet my goals.

System Usage
As I mentioned I want to have it all. If I had to make an order of importance, it would be Gaming (WoW Full Graphics 30+ Frames in Raids, COD:MW 2, and future games as well). I would also like to play around with a Hackintosh, seeing as my current computer hates Hackintosh to hell.

Parts Not Needed
OS, Ill just run Win 7 7600 until I decided to buy Windows 7 RTM. I'm not looking for a monitor now, (Mine is 20 inches, 1680x1050) but I am looking to get between 20-25 inch 1080p 120 hertz monitor in the future, for Nvidia 3D. I will probably be using my current CD Burner as well.

Preferred Website
Newegg.com I would prefer all parts from here, unless there is a 30-40 difference from another website.

Parts
Now this is a bit tricky, because I have a somewhat of a strict price and prices can change after a month. The more controversial parts are the latter ones.

CPU -$300
I believe the prices for these are dropping in September, and this is moving down to i5, but not 100% sure. I am however going to be spending $300 on the processor, whether or not the i7 prices are going down.
Intel Core i7 920
http://www.newegg.com/Product/Prod [...] 6819115202

Ram -$115
So far I believe these are probably the best bang for your buck ram in an OC environment.

OCZ Platinum 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600
http://www.newegg.com/Product/Prod [...] 6820227381

Hard Drive - $95
The only problem I can see myself having with these is the sound. Are the Green drives quieter by a lot? Will I see that big of a lag between Black/Green when I'm dealing with HD/Gaming on my computer?

Western Digital Caviar Black WD1001FALS 1TB 7200 RPM 32MB
http://www.newegg.com/Product/Prod [...] 6822136284

PSU-120
It's either the Corsair 750 that everyone loves, or a Ultra Quiet Silverstone at 19 dbA

CORSAIR CMPSU-750TX 750W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply - Retail
http://www.newegg.com/Product/Prod [...] 6817139006

or

SILVERSTONE ELEMENT ST75EF 750W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS BRONZE Certified Active PFC Power Supply - Retail
http://www.newegg.com/Product/Prod [...] 6817256049

Motherboard -$260, but I would like to spend around $200
3-Way Sli is a must in a motherboard. I am planing to use 2 PCI Express 2.0 slots for my Sli configuration, and the remaining for an internal TV Tuner.
I am eyeballing the
GIGABYTE GA-EX58-UD4P LGA 1366 Intel X58 ATX Intel Motherboard - Retail
http://www.newegg.com/Product/Prod [...] 6813128374

But I really don't want to spend that much money on a motherboard. I just want one that can OC to 3.6 in a stable environment with a voltage change minimal voltage change. Does anyone know a 3-Way Sli support motherboard that is good with overclocking and is less expensive, that would be appreciated.

Graphics Card - $440 (The MSI GTX 275's prices have changed twice within the last 2 days, from 250 to 200 to 250 to 220 currently)
Nvidia is a must, seeing as I will probably be getting Nvidia 3D.

2x MSI N275GTX TwinFrozr OC GeForce GTX 275 896MB 448-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card - Retail
http://www.newegg.com/Product/Prod [...] 6814127429

Case - $250, spending a lot on the case for good air flow and a silent PC.
Well this is probably what it comes down to when I want to make my computer silent.
I was thinking the Raven 01 because I saw reviews that said if you put stuff in the case it will automatically drop 4-7 degrees C. Also it is large and thick which may make it a good sound dampener, but I haven't read this from owners, just a random prediction. The 90 degree motherboard is nice for bragging rights.

SILVERSTONE RAVEN RV01-BW Black Steel / Plastic ATX Full Tower Computer Case - Retail
http://www.newegg.com/Product/Prod [...] 6811163135

If I can't achieve a Silent PC with this case, does anyone have any good cases in mind? Or any tips to try and make this case a silent PC.

TV Tuner - $80
I don't have to a much research done for which TV Tuner is good/great, but I picked one that was an a popular tech site. I would really like input on this.

ASUS My Cinema-PHC3-100/NAQ/FM/AV/RC TV Tuner Card PCI Interface - Retail
http://www.newegg.com/Product/Prod [...] 6815293003

Heatsink - $55
The hardest choice I am seeing myself making is picking out a good heatsink. I want something quiet yet powerful, and one that has an intake and outtake. I will probably be replacing the fans I get with the heatsink, with quiet ones, if they are not quite already. This is the one I ended up choosing. If anyone else any good ones please put them up. With Arctic Silver 5 Thermal Compound - OEM

Vigor Monsoon III LT Dual 120mm Fan CPU Cooler Socket 1366 Ready - Retail
http://www.newegg.com/Product/Prod [...] 6835702007

Speakers - Max $75
This is a department where I have no clue in, all I really want is a decent set of 4.1 or 5.1 surround sound set

Overclocking: Yes SLI: Yes

Final Thoughts
I really want this computer to be super silent. If that means I have to switch to fanless GPU heatsink, I probably will go that far.

Another good heatsink, Core Contact Freezer. You need the LGA-1366 mounting bracket with it sold separately.
Or Xigmatek Dark Knight.