Well, I'm under a tight budget, so how would a GT 430 work out in comparison? I've been looking at the below Nvidia link as a reference.
http://www.geforce.com/Hardware/GPUs/geforce-gt-520/performance
The only GTs worth looking at since the 9800 GT was a currently produced card have been "40s", like the GT 240 was, but now it's out of production. I don't think that the newest 40s are any better than the 430, though -- the 430 was designed for HTPCs, for entertainment, and for some older games. It is better than a 520, but not really by enough to be in contention. These days, look for GTS or GTX if you insist on Geforce, and pay a bit too much most of the time, although there have been some really great rebates on GTX 460s lately.
In the middle zones, AMD Radeons have all the best price points sewn up. You just get far better bang for your buck from an HD 6570 or HD 6670 than from a GT from nVIDIA, any of them.
http://www.tomshardware.com/reviews/fastest-graphics-card-radeon-geforce,3085-2.html
I found better prices on HD 6670s than on HD 5670s, at Newegg, at least.