GEForce is not that new, it has been out for over a year now and, as far as I can tell, it is not buggy at all. I bought an Elsa Gladiac GEForce 2 GTS card last may When they first came out. I still have the card and it performs flawlessly. It always has and, as far as I can tell, it always will. I don't think you need to have any reservations if you try a GEForce card, they have been tried and proven.
sincerely,
sx/amiga