CORRECT ME IF I AM WRONG!
Particularly, I am hoping a SINGLE 8800GTX can handle FPS games like FEAR and HL2 and simulation games like FS9, FSX. Comments?
Yes it is powerful enough.
I checked many reviews of the new Geforce 8 and am suprised how weak the 8800gts is at high resolution like 2560 and similar, only without AA AF it is playable and then the 7950gx2 is mostly faster, if SLI is used (f. g. FEAR)!
Overclocking is said to be very good on the latest 7950gx2 and and its price at ebay is significant lower than 8800gts (25% in my case).
-> So if you want to save some money get the 7950gx2.
The 8800gtx is 30-60 % faster (more with AA AF) but the price and availability is appropriate.