I wouldn't recommend to buy this one!!!
You should better look for a geforce gtx 460 with 1024 MB because it's much faster then the 465 and of course the 9600GT ;-)
The compatibility with games doesn't depend on the graphic-card...if KotOR had worked on your old card it should work now too.
I got a geforce 460 myself last christmas and until now all worked perfectly :-D
That's my:
http://www.amazon.com/MSI-Geforce-460GTX-PCI-Express-Graphics/dp/B00446CJDM/ref=sr_1_1?ie=UTF8&s=electronics&qid=1304532984&sr=8-1
it has the power of a gtx 470
I hope I could help you