i checked this out at newegg...you could trim some $ here or there depending on how much video editing you plan to do...

KINGWIN BLACK All Aluminum 10-Bay Mid tower case, Model "KT-424-BK"
Item# N82E16811170014 $84.50

Western Digital 160GB 7200RPM SATA Hard Drive, Model WD1600JD, OEM Drive Only
Item# N82E16822144152 $95.25

2x Kingmax 184 Pin 512MB DDR PC-3200 (1gig total)- OEM Item# N82E16820156006 $129.00

ASUS "P4P800-E Deluxe" i865PE Chipset Motherboard for Intel Socket 478 CPU -RETAIL
Item# N82E16813131492 $113.50

COOLMAX 550W Taurus CX Series Silent Power Supply, 1 x 120mm fan, 3 Speed Fan Control Switch (Auto, Low, Medium), BLACK, Model "CX-550B"
Item# N82E16817159026 $69.50

Intel Pentium 4/ 3.0E GHz 800MHz FSB, 1MB L2 Cache, Hyper Threading Technology - Retail
Item# N82E16819116171 $189.00

ATI AIW RADEON 9800PRO Video Card, 128MB DDR, 256-bit, DVI/CATV/VIVO, 8X AGP, Model "ALL-IN-WONDER 9800 PRO" -RETAIL
Item# N82E16814102297 $239.00


total: 919.75+tax/shipping