Yeah it looks like I was worried over nothing... I went over to Subsim.com forums and Win 7 is ok for SH3 and SH4.
I think I put together a comparable RIG at magicmicro... I used the ATI 5770 as recommended by Spikes. Everything look ok? I just can't see myself putting one together right now.
$1,121
CURRENT CONFIGURATION
PARTS : CPU : Intel i7 CPU
Intel Core i7 920 2.66GHz (Quad Core) 8000K
PARTS : Cooling Fans : Intel i7 CPU Fans
Intel Socket 1366 CPU fan
PARTS : Motherboards : Intel i7 Motherboards
MSI X58M, DDR3, SLI & Cross Fire, GB LAN, IEEE
PARTS : Memory : DDR3 Triple Channel memory
6GB (3x2GB) PC3 8500 DDR3 1066 Triple Channel
PARTS : Video & TV Cards : PCI-Express Video cards
ATI Radeon HD 5770 1GB PCI Express 16x dual head, HDMI
PARTS : Video & TV Cards : TV Tuner & Capture cards
NONE SELECTED
PARTS : Hard Drives
500.0GB Hitachi 7200RPM SATA2, UDMA 300 8m cache
PARTS : Cooling Fans : Hard Drive Fans
NONE SELECTED
PARTS : Hard Drives
NONE SELECTED
PARTS : Cooling Fans : Hard Drive Fans
2nd Hard drive Fan NONE SELECTED
PARTS : CD/DVD/R/RW Drives : DVD Recorders
Lite On 22x DVD Recorder Dual Layer +R/RW -R/RW
PARTS : CD/DVD/R/RW Drives : DVD Recorders
NONE SELECTED
PARTS : Media Card Readers
NONE SELECTED
PARTS : Sound Cards
Realtek HD digital audio (onboard)
PARTS : Modems
NONE SELECTED
PARTS : Networking : Network Cards
Ethernet network adapter (onboard)
PARTS : Controller Cards
USB 2.0 Adapter Card 4 port PCI
PARTS : Cases / Power Supplies : Cases
Cooler Master Elite 310 black, Side Window, front USB
PARTS : Cooling Fans : Case Fans
Dual Case Fans 80 mm DC fan (two fans)
PARTS : Cooling Fans : Power Supply
Ultra LSP 750W ATX Power Supply, SLI & X-fire ready
PARTS : Keyboards
NONE SELECTED
PARTS : Mice
NONE SELECTED
PARTS : Speakers
NONE SELECTED
SOFTWARE : Operating Systems
Microsoft Windows 7 Home Premium 64bit DVD
SOFTWARE : Office Software
NONE SELECTED
PARTS : Monitors
NONE SELECTED
PARTS : Assembly and Test
Standard assembly and test 3-5 business days