I haven't built a computer in over 3 years. So, please help me evaluate the compatibility of this potential build. Thank you.
 
Product Description  
Intel Core 2 Quad Q6700 Kentsfield 2.66GHz LGA 775 95W Quad-Core Processor  
http://www.newegg.com/product/prod [...] 6819115027
 
ASUS P5N-E SLI LGA 775 NVIDIA nForce 650i SLI ATX Intel Motherboard - Retail  
http://www.newegg.com/product/prod [...] 6813131142
 
hec ACE580 ATX12V 580W Power Supply - Retail  
http://www.newegg.com/product/prod [...] 6817339006
 
G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory Model F2-8500CL5D-4GBPK - Retail  
http://www.newegg.com/product/prod [...] 6820231166
 
Seagate Barracuda 7200.11 ST3500320AS 500GB 7200 RPM SATA 3.0Gb/s Hard Drive - OEM  
http://www.newegg.com/product/prod [...] 6822148288
 
DIAMOND Viper 3870PE4512SB Radeon HD 3870 512MB 256-bit GDDR4 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail  
http://www.newegg.com/product/prod [...] 6814103050
 
SAMSUNG 20X DVD±R DVD Burner with LightScribe Black SATA Model SH-S203N - OEM  
http://www.newegg.com/product/prod [...] 6827151154
 
Thermaltake SopranoRS VG7000BWS Black SECC ATX Mid Tower Computer Case - Retail  
http://www.newegg.com/product/prod [...] 6811133046
 
ASUS P5M2-8SB4W 80mm SuperFlo CPU Cooler – Retail
http://www.newegg.com/product/prod [...] 6835101013

Looks like a nice system... I would consider a different PSU. The one you have choosen has a nice price tag, but you get what you pay for.
I like Antec or Enermax, they are better quality.

Also you could save some cash by going with pc6400 CL4 (800MHZ) as you will not see much difference in speed but you will in price.

heatsinks...  
choose from this list or dont bother upgrading... I cant understand why a person would upgrade to a $14 heatsink
 
http://www.frostytech.com/top5heatsinks.cfm
 
edit
**you would be surprised how good stock coolers are. the $14 one prolly be worse**

Thanks grieve. I knew someone would say something about the power supply.  I'll also take a look at getting a better heatsink. Is the video card OK? Should I get a cheaper video card and a separate TV tuner card? I think the video card will require quite a bit of power, but it seems like a nice card.

Ram is OVERKILL.  Your Processor won't allow you to overclock enough to really require 1066.  800mhz is Ideal.
Consider a different CPU cooler.  Artic Freezer 7 if your on a budget,  or maybe a Tunq Tower for a litte more.
the Graphics card is fine,  I would personaly go 8800GTS, but this is more my personal pref.  Likewise with the 650i chipset MoBo.  I would prolly not go Nvidia chipset,  but again this isn't a big detail,,  somepeople like em..  I dont

Thanks psymonx. I see that the 8800GT(S) is pretty popular. I wanted the digital TV tuner so I figured I would either get it all in one card or buy a separate video card and tuner card.