Well since you don't play much games and only emulation games, which do only need a smaller type graphics card, a geforce 4 really will do you fine, as theres no point spending more on somethnig you don't need. Though I found a geforce 5 class card called the 5200, which is okay for new games too, though not at high settings. It is also very cheap now and will do your work, plus you will have some flexibility on what you want to do:
You should have an AGP interface which will let this be plugged in, as I think your TNT2 used a 4x AGP interface, while this uses an 8x but is still compatable with older speeds of AGP too, so you should be fine for anything you want to do
That site gives you a list of prices all in american money , and the cheapest is 48 dollars
That DVD writer seems like a great kit too
I hope this speeds it up for you, as it is kinda new, but cheap too.
Oh and it also has a TV Out function so you could watch what you've captured on a TV before copying I would presume with that device
EDIT: How much hard drive space do you have? Or does it automatically copy straight onto the disc as it's capturing?
Hope this helps