Video cards recommends??????

Hi all, I'm seriously debating changing my video card out.
I have a 64 meg Nvidia card right now and am happy, but (as we all do at some point) was wondering about the visual differances with some better cards.
What cards do you recommend and why. I've been checking ebay and the Ti's with 128 meg ddr look good and are fairly in-expensive and the quatros look like a high end card at around 300.
I'm a Nvidia user from way back because of the great driver support but would like to hear from folks using other chip sets to see if I'm missing out on anything.
Hope to hear some recommendations!
I have a 64 meg Nvidia card right now and am happy, but (as we all do at some point) was wondering about the visual differances with some better cards.
What cards do you recommend and why. I've been checking ebay and the Ti's with 128 meg ddr look good and are fairly in-expensive and the quatros look like a high end card at around 300.
I'm a Nvidia user from way back because of the great driver support but would like to hear from folks using other chip sets to see if I'm missing out on anything.
Hope to hear some recommendations!