*Edit! Tossed together what should be a close-to-final build. Updated with suggestions from below as well as research. Still debating the 4g vs 8g memory and the 8800GT Versus the 8800GTS Versus the 8800GTX, although right now the GTX is in the lead!
*Edit - Quick question! What exactly is the 'Enthusiast design for overclocking'? Also, the cheaper of the two has 2x PCI Express 2.0 where the expensive one has 2x PCI Express, that a deal breaker at all?
The second motherboard got substantially better user reviews.
Conservative power estimates (based on online data, spec sheets, and personal measurement):
8800GT X 2: about 15 a (180 watts)
CPU: less than 8 amps (100 watts)
8 GB RAM: less than 12 amps @ 3.3 volts (40 watts)
HD: 20 watts (about 1 amp each at 5v and 12 volts)
DVD: about 30 watts (1.5 amp @ 5 volts and 2 amp @ 12 volts)
Motherboard: probably no more than 3 amps @ 12 volts and 4 amps @ 5 volts (55 watts)
No more than 425 watts. Add on less than 2 amps for fans - less than 450 watts and a minimum of 32 amps at 12 volts.
The biggest cost savings would come from ditching the SLI video. Then you could also drop the 750i motherboard and replace it with something like a less expensive Gigabyte board. That would enable you to use a smaller, less expensive PSU.
I tell you, with all the bad noise I'm hearing about SLI, I'm about to drop it! I have heard almost nothing but bad things, heh. Going to have to go browse a bit, find a nice single card that's comparable or better than 2x 8800gt's and compare pricing!
Heres my case and its simple, but good looking.
Fan LEDs & Neon Cathodes around the sides. Problem is with clear cases you have to make sure the wires are tidy, and invisible, and i think that i did a pretty good job :]
You did a decent job on picking out your parts to begin with; however I think you need a little help in a few areas...
First off I noticed you need help on the motherboard. From the looks of it, you want to SLI. Well if that's the case, you're going to need something with an nvidia chipset. The 750i motherboard is a good choice for you, like the Evga 750i FTW.
Secondly, That awful case. It seems very cheaply made, and its probably noisy. You're going to want to buy something that is durable, quiet, and provides good cooling to your important hardware. Mainly...something that will last you multiple builds. Look at something from Lian Li. I use the Lancool K10.
In your shoes, I would avoid SLI entirely though, the gains you get, don't seem to denote the extra price you have to pay. Here are some suggestions I make. An intel p35 chipset based motherboard; something like that Abit IP35-Pro, or MSI Neo2FR or something from DFI.
For your graphics card, get an Nvidia 8800GTS 512mb, get an aftermarket cooler on it(like a Thermalright HR-03 or V2), and overclock it.
The Antec 900 is a solid case with very good cooling.
For video I'd either wait for the next NVidia or ATI series (both due out soon) or go with an 8800GTS (G92) 512MB card like http://www.newegg.com/Product/Product.aspx?Item=N82E168... Make sure it's the 512MB G92 card and not the 320 or 640MB versions. The 8800GTX is nice but there's not a huge improvement over the 8800GTS (G92) and it costs a lot more.
As for Vista 64, it's a definite yes. I've been using it for over 6 months and the only thing it hasn't been able to run on it is our Juniper vpn software because the drivers for the version we're using aren't digitally signed. If you're using hardware and software that's come out in the past year or two then you should be fine.
Ok, edited the first post to reflect the changes! Dropped the SLI & got the one card, still on the fense on the GTS versus the GTX. Going right now to look at power supplies and motherboards (P35 types!).
The GA-EP35-DS3L is cheaper and would probably be ok but I've heard that the current BIOS has problems with overclocking because it doesn't seem to allow you to change the voltage on the processor.
I have a DS3P and it has no problem pushing CPU voltage up past 1.5 volts. OTOH, I do not know what the difference is between the two. Downtown Dhahran didn't have a DS3L when I went motherboard shopping last month.
I have an Antec 900 case. It's basically a low tech case with great cooling. Not being toolless does not bother me, but I DO miss a removeable motherboard tray.
Setting the fans to Low, Medium, or High made no difference in internal temps. That's good because with the fans set to High, it sounds like a vacuum cleaner.
Remeber, the PSU sits in the bottom. The 12 volt CPU power cable on my Antec (!!!) 650 watt TP3 was just long enough.