The problem with purchasing top of the line cards, besides the price aspect, is the fact that they require a huge system overhaul in order to make them run optimally and you’ll need a new power supply to get them running.
The NVIDIA GeForce GTX 460 sports a bit less bandwidth and isn’t as power hungry as its older siblings but at its $199 MSRP (for the 768MB version, 1GB configurations will no doubt run costlier) its brute force pedigree is still in full effect and should keep you in the game without any of that messy whole system upgrade mess.
Nvidia GeForce GTX 460 1GB Graphics Card Review @ bit-tech
NVIDIA GeForce GTX-460 768MB Video Card @ Benchmark Reviews
NVIDIA GeForce GTX-460 1GB Video Card @ Benchmark Reviews
GeForce GTX 460 review (roundup) @ Guru3D
NVIDIA GeForce GTX 460 Review @ HardOCP
NVIDIA GeForce GTX 460 1GB & GTX 460 768MB Review @ Hardware Canucks
NVIDIA GeForce GTX 460 768MB and 1GB Video Card Reviews @ Legit Reviews
NVIDIA GeForce GTX 460 Review – GF104 and the budget Fermi @ PC Perspective
MSI GeForce GTX 460 Cyclone OC 768 MB @ techPowerUp