Upgrading for the holidays, please help!

[A2TheRizzo]

For my Birthday/Christmas I will be doing my annual upgrading.

My budget is $800, and I'm ordering from Newegg.

Right now I'm running
AMD Athlon X2 4600+
2gigs of Ram
7900GT
500Watt Fortron Source PSU
ABiT NF-M2 nView

In a Silverstone SG-01

The rest is not important.

Here's a list of what I have compiled.

COOLER MASTER RC-690
http://www.newegg.com/product/product.asp?item=N82E16811119137

EVGA 8800GT
http://www.newegg.com/product/product.asp?item=N82E16814130303

AMD Athlon 64 X2 5000+ Brisbane 2.6GHz Black Edition
http://www.newegg.com/product/product.asp?item=N82E16819103194

CORSAIR XMS2 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800
http://www.newegg.com/product/product.asp?item=N82E16820145590

Vista 64-Bit Ultimate
http://www.newegg.com/product/product.asp?item=N82E16832116215

and Tuniq Tower Heatsink
http://www.newegg.com/product/product.asp?item=N82E16835154001

After these upgrades, I will be running
AMD X2 5000+Black Edition
4GB DDR2 800
8800GT
500Watt Fortron Source PSU
ABiT NF-M2 nView
Dual Booting XP Pro and Vista Ultimate

Now I have a few questions

The motherboard I am using and will be using is mATX, that should work without giving me problems, correct?

Will my 500Watt Fortron Source PSU be able to handle all of this?

What fan (If any) would you recommend for the Tuniq Tower

Would this rig be able to run Crysis and COD4 adequately at 1680x1050 Resolution?

Thank you for your time and effort.

 

[Dangman]

To answer your questions:
- Yes your mobo will work fine in that ATX case. Most good ATX cases can fit mATX mobos with no problem
- What is the exact model of that Fortron Source PSU?
- I recommend going with the Ultima 90 instead. It cools just as well as the Tuniq but it's easier to install:
Thermalright Ultima-90 HSF - $46 & Panaflo FBA09A12M 92mm Fan - $3

Though If you like the Tuniq Tower, the default fan is fine. Though if you want that something better, I recommend getting an S-Flex:
Scythe S-Flex SFF21E 120MM Case Fan - $14

- COD4 yes, Crysis, no idea. Haven't checked up lately how well Crysis runs nowadays on current hardware. Though most likely yes if you're willing to turn down a few settings here and there.

Now onto the critique:
Why specifically newegg?

Ditch the Corsair RAM. For $7 less, you can get this Patriot RAM instead that has Micron ICs which means it can OC pretty damn high:
Patriot PDC22G6400LLK 2 x 1GB DDR2 800 RAM - $60

Also, do you actually need the backup and security software of Vista Ultimate? If not, save some money and go with Vista Home Premium.

 

[engiNURD]

I agree with Danny.

Though, why a new CPU? Why not just OC the one you currently have?