I'm thinking of buying THIS computer! Should I??

The 4800+ is good if you have tons of money to spend. For a better value, I recommend getting an Opteron 170 or 175 and just overclocking it (or not). Heck, an Opty 165 would probably suffice for gaming needs (it does for me). Save hundreds of dollars with this option!

Good choice on the WD74gb (I assume that's what you meant), and that CPU cooler is an okay deal--I have both, no complaints. Instead of the 7800GTX, grab the 7900GT. Also, trade in that Plextor DVD+R for an NEC 3550A (or a 3540A if you can find one)--smaller cache, but a reliable drive and a great deal.

Best of luck!

$4000 Canadian huh? I am guessing this is a prebuilt system? or are you building it on your own and this is your parts list?

Lets see here.. break this down part by part..

Specs:

AMD X2 Dual Processor 4800- $749.95. Instead go with an Opteron 175 for 649.95 and overclock it 200MHz. The Opteron is a server grade chip and will server you better.

2048 PC3200 Corsair TWIN-X Memory- good stuff $309.95

2 SATA-300 Seagate Barracuda 7200.9 Hard Drive 300gb

1 WD7300GD Raptor Drive (Boot - 73gb 10,000rpm)
why do you need 600GB of storage plus a boot drive? Unless you want to buy an extender with Windows MCE and run a media centre to your TVs, this seems overkill. Ditch the Raptor and both the 300GB hard drives and get something like a 500GB. Maxtor 16MB cache 500GB drive - $359.95

Unless you plan on playing games like CoD2, FEAR, Farcry etc at totally max setting on something like 20" LCD you do not need SLI. SLI does not generate 100% performance gains, more like 20-30%. Instead go with this:

Asus AN8-E motherboard - $119.95
eVGA Geforce 7900 GTX 512MB - $649.95

Not sure of the price of the Plextor, but BenQ makes great DVD burners (I have owned several)
Normal- $45.95
Lightscribe- $69.95

Creative sound card- great card, maybe a touch overkill but will certainly make games sound awesome with some good speakers- $129.95

Antec P180 - LOVE this case- $159.95

As far as the PSU, not sure on that brand.. OCZ makes a 600W (good PSU) for $239.95

As far the CPU cooler, not bad $49.95.. I use an Atric Cooler Freezer 64 and my CPU rarely gets above 40C- $39.95

So lets see here:
My price- $2894.89 + shipping.
All prices come from Memory Express a nice PC parts joint in Alberta. They will ship anywhere in Canada however.

"SLI does not generate 100% performance gains, more like 20-30%"

What is your source for this 'much quoted' (by others as well) 20-30% typical gain with SLI? (THose sorts of gains might be realistic with 6800GS cards, but gains with 7800GT/7900GT/7900GTX are much more substantial than ~25%, unless benching at very low resolutions.

It is complete nonsense...

FEAR performance will go up 80-90% at even 1024x768/4xAA/16xAF....

50-75% gains, depending on the resolution, are commonplace...

DO you wish some links to benchmarks? :-)

"If you really want SLI, get dual 7900GTs.
"

Indeed, that SLI combo offers startling performance for a mere $600! :-)

Well he is in Canada and Canada has about a 20-30% preminum for tech stuff over the US. Also, when writing my post 3 different Canadian part places did not even offer the 7900GT just the GTX. The 7800GT was the only one available.

if i was you i wuold keep everything except:
1) video card- get a single 7900gtx and wait until later if you need to upgrade sometime in 2+ years and get another 7900gtx
2) CPU that's overkill get either a 4400+ or a opteron 165,170,or 175 and save yourself some money
3) maybe the CPU cooler u could get a zalman 7700cu although it is not as pretty since it has no leds