First build, i7 Gaming PC $1300

Hi, I'm new to the PC making scene though I think I know enough to put one together.
I've been looking to put my first one together and make it a good bit future proof.
So because of that I chose the i7 and x58 as they seem like they will stick on top as the faster setups.
I have a pretty good idea of what I want to use for it, though still a few questions.

APPROXIMATE PURCHASE DATE: In the next few weeks to month.
BUDGET RANGE: Around 1300 Before Rebates
SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: Gaming for the most part, and watching videos as well I suppose.
PARTS NOT REQUIRED: keyboard, mouse, monitor
PREFERRED WEBSITE(S) FOR PARTS: Right now I've mostly been looking through tiger direct and newegg but if somewhere has a better deal let me know.
COUNTRY OF ORIGIN: United States
PARTS PREFERENCES:No preference really. Just quality stuff with good Warranties.
OVERCLOCKING: Yes or maybe.
SLI OR CROSSFIRE: Yes in the future
MONITOR RESOLUTION: 1280 x 960

ADDITIONAL COMMENTS:
Case - COOLER MASTER Storm Scout
Operating System - Windows 7
Monitor - Syntax Olevia LT26HVE 26-Inch 1280 x 960?
Chipset - Intel core i7 920
Motherboard - ASUS P6T Deluxe V2 or ASUS P6TD Deluxe
HDD - Haven't Chosen yet, probably going to grab a 1TB drive.
Graphic Card - XFX version of the 5850 X2 in the future
RAM - 6 GB DDR3 RAM
PSU - Suggestions? not sure how much I will need.
Optical Drive - Haven't chosen one yet. Probably the last thing I'll look at. DVD/CD R-RW

Right now I'm using my dads old monitor it is a Olevia 26-Inch I'm running it in 1280 X 960 because it looks good this way, not sure if it's the right res though.

Like I said this is going to be a gaming computer and I thought the 80 extra would be worth it to go to an i7. I am also going to go with Windows 7.
Right now I'm choosing between the ASUS p6t Deluxe V2 and the p6td deluxe.
They seem to be about the same exept the p6td is cheaper and only has 1 of the 2 lans that are on the V2, though I don't see myself needing that.
Are there any other differences between the two or is the p6td a better choice?

The GPU I decided to go with is the XFX version of the 5850s IF anyone ever gets anymore in stock, and then later on upgrading to a 2nd in crossfire.
The case is the Storm Master Scout, and I'll be adding one fan on the side and the 2nd on top possibly see if I can't fit one in the empty external drive bays as I'll only be using one of the five. Though I have thought of adding some kind of temp display or something left behind the mesh. That would look fairly cool.

I am thinking of doing SOME overclocking, mostly getting the cpu to hit 3ghz however this is going to be an air cooled system so nothing major.

Another thing I need help on is what PSU should I use for this? I was thinking a 700-800 wat modular PSU would be about right. Am I right and are there any suggestions on specific brands?


The last thing I'm stuck on a bit is the RAM I have a few choices I have narrowed it down to but not sure which would be best.

The first choice is also the best but I'm wondering if it is worth the extra money and if the brand is good. 1600 and 6-7-6-18 at 1.6V for $195
G.SKILL Trident 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL6T-6GBTD - Retail

The middle one OCZ which I hear is good. 1600 and 7-7-7-24 at 1.65V for $164 with the mail in rebate and bundled with the i7-920 for $12 in savings.
OCZ Platinum 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Low Voltage Desktop Memory Model OCZ3P1600LV6GK - Retail

Then the cheapest is again OCZ. 1600 and 9-9-9-24 at 1.65V for $115 with the mail in rebate and can be bundled with the P6T -$30 and P6TD -$25
OCZ Obsidian 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model OCZ3OB1600LV6GK - Retail


So the best is obvious at $200 but that's pretty spendy especially when I can get the cheapest for under $100.
Not sure how much better the 3 Cas latency will make them.

Anyway thanks for any help and suggestions right now I should be hitting $200-$300 above my mark when everything's bought, but the few extra bucks will be worth it when the parts aren't old news in a few months. I don't think I left anything out but if I did let me know. Or if there's to much information feel free to let me know then too. haha