for $140 you won't be getting ultra details with max AA/AF - just to inform you.
If your lucky, you can pick up a GTX460 1GB for $140 - or a Radeon 6850 - both equally as powerfull.
If not you may have to settle with Radeon 6790.
But If I take GTX 550TI, is it a good card?
How much budget I need to getting ultra details with max AA/AF?