Requesting opinions for 3k-4k gaming rig

Looking for general opinions on my latest project, will keep things as short as possible seeing as most people on here know what they are doing.

APPROXIMATE PURCHASE DATE: now until the ned of summer (august)

SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: Games, Folding@home, movies, internet

PARTS NOT REQUIRED: NA

PREFERRED WEBSITE(S) FOR PARTS: Ncix

PARTS PREFERENCES: Here we go:

Thermaltake Level 10 Full tower
http://www.ncix.com/products/?sku=48082&vpn=VL30001N1Z&...

Asus p6x58D mobo
http://www.ncix.com/products/?sku=52155&vpn=P6X58D-E&ma...

Core i7 930
http://www.ncix.com/products/?sku=50913&vpn=BX80601930&...

I actually have not done any research on ram, so any help in this catagory would be fantastic

ATI Sapphire Radeon HD5970
http://www.ncix.com/products/?sku=52224&vpn=21165%2D00%...

For hardrives I'll get 1 solid state, probably around the ballpark of 80G paired with 2 2TB HDDs.

PSU I'm assuming at least 900W, if not 1000W to be safe.

Not sure if I want to stay air or go water cooling, leaning toward air since I don't have any experience in water cooling.

Will also be purchasing the 30" Dell moniter
http://accessories.us.dell.com/sna/products/Displays/pr...

Razer Mamba and g19 keyboard.

OVERCLOCKING: Yes SLI OR CROSSFIRE: Yes

MONITOR RESOLUTION: 2560x1600

ADDITIONAL COMMENTS: Purpose of this build is to achieve high end performance without top end prices. I did not skimp on the video card because the last time I did that when I built my last rig in 2007 I bought an 8800Gtx as opposed to the ultra at a 300$ difference and ended up being unhappy with the performance or my SLI cards. If the is a significant difference say going between the core i7 930 to a top end processor in the $900-$1000 range that justifies the price tag then by all means please let me know.