<Generic copy/post from another thread. Doesn't completely apply due to your video card, case, and hard purchase. Further, you aren't limited by size.>
Recently just ordered parts for 2 new builds for friends. Both will be used for "light multi-tasking," but mostly "MMO Gaming."
Case: COOLER MASTER Elite 360 <They wanted "smaller" desktops than mid-towers. This case offers desktop and tower "usable" configurations, ATX MB usability, and decent price.>
http://www.newegg.com/Product/Product.aspx?Item=N82E16811119195
PSU: OCZ ModXStream Pro OCZ700MXSP 700W <Modular for case. Plenty of power for eventual duel 4770 Crossfire.>
http://www.newegg.com/Product/Product.aspx?Item=N82E16817341018
CPU: AMD Phenom II X3 720
http://www.newegg.com/Product/Product.aspx?Item=N82E16819103649
MB: GIGABYTE GA-MA790X-UD4P <Crossfire capability, socket AM2+, DDR2 ram usage>
http://www.newegg.com/Product/Product.aspx?Item=N82E16813128387
Ram: Patriot Viper 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 <Fast timings at DDR2 800 in duel channel mode, AM2+ CPU socket limitation>
http://www.newegg.com/Product/Product.aspx?Item=N82E16820220335
CPU Cooler: COOLER MASTER GeminII S <Smaller profile for small case. Offers ability to directly blow air on ram if wished.>
http://www.newegg.com/Product/Product.aspx?Item=N82E16835103046
Thermal: ARCTIC COOLING MX-2
http://www.newegg.com/Product/Product.aspx?Item=N82E16835186020
Burner 1: LG Black 22X
http://www.newegg.com/Product/Product.aspx?Item=N82E16827136152
Burner 2: LITE-ON Black 24X <Retail for software.>
http://www.newegg.com/Product/Product.aspx?Item=N82E16827106291
Graphics Card: XFX HD-477A-YDLC Radeon HD 4770 <Expensive, but the warranty is nice. Crossfire in future.>
http://www.newegg.com/Product/Product.aspx?Item=N82E16814150366
Hard Drive: Western Digital Caviar Green WD10EADS 1TB <Case only allows for a single drive. Further, users requested disk space.>
http://www.newegg.com/Product/Product.aspx?Item=N82E16822136317
Wireless: ENCORE ENUWI-N IEEE 802.11b/g, IEEE 802.11n Draft 2.0 USB 2.0 802.11n Wireless Adapter <They requested wireless capability, but not "usually used." I don't know why, but you do what they tell you...>
http://www.newegg.com/Product/Product.aspx?Item=N82E16833180053
"Video Exhaust Fan": Rexus NMB-MAT (Panaflo) 80mm
http://www.newegg.com/Product/Product.aspx?Item=N82E16835705019
"CPU/Case Intake Fan": Scythe GentleTyphoon D1225C12B4AP-14 120mm
http://www.newegg.com/Product/Product.aspx?Item=N82E16835185091
OS: Vista Home Premium SP1 64-bit <They requested it...>
http://www.newegg.com/Product/Product.aspx?Item=N82E16832116488
Monitor: ASUS VW224U Black 22" 2ms(GTG) Widescreen LCD
http://www.newegg.com/Product/Product.aspx?Item=N82E16824236050
<No keyboard, mouse, or speakers at this time.>
Cost: Slightly over $1,000 US Dollars post mail-in rebates & shipping
Another $120 dollars would make it a Crossfire system if so desired.