1) Depends on what games you are (thinking of) playing.
2) I have previously owned an ATI/Radeon 9000Pro and I must say I was very pleased with it. However, Max Payne 2 is about the best it could do Donot expect the Core and/or Memory cycles to be much higher. Do keep in mind that I do have an AGP port avaible
3) Not unless you plan on buying an entirely new mainboard with an AGP slot. Or unless you can find a better PCI card. However, if you inform us of the games you intend to play we may be able to better assist you.
I find the price to be quite expensive, to be honest, 9200SE cards are avaible at 40 euros and less. (Approximately 50 dollars) Perhaps it is because it is a PCI edition, I donot know. So far I have only seen AGP cards.