I would try pricewatch to find the best price on whichever video card you choose to buy. As to which Geforce to get, I would reccommend the Ti models over the MX models if you can afford to buy one over the other.
edit: Like you, I used to have a Voodoo 3. Unfortunately, instead of going for the Geforce model, I went and bought a Radeon 7000. Now even some of the games that used to work don't work anymore
edit: Like you, I used to have a Voodoo 3. Unfortunately, instead of going for the Geforce model, I went and bought a Radeon 7000. Now even some of the games that used to work don't work anymore