Heh, I'm in the same boat, Demoth. Bought a $53 shipped Jaton 6600 non-gt newegg refurb special. And it's been adequate for far cry, CoV, GW, bf2 at 1024x768 or 1280x1024, medium-ish settings. Half the performance of a 6600GT, but still miles above the 'minimum' targeted by devs.
I was pretty blown away. Heck, even the built in X200 video does a lot better than I expected. When I get home with Oblivion in hand, that'll change. I think a 7600GT is in the cards for me short term. But even budget cards can do shockingly well -- if you get the RIGHT budget card.
If it were me, I wouldn't touch an S27 chrome with a barge pole. Without the dev budgets the big boys have the drivers are unlikely to be supported long, and the card may well render less popular titles incorrectly. It already does that on some pretty mainstream titles, according to some reviews. Hardly worth saving a few bucks for.