I once used a SB Live card, but when I got more interested in recording I went for an M-Audio Audiophile 2496 (the PCI card, not the USB or Firewire versions).
It gives me great performance for my uses. The cost must be well under $200 by now. You only really get two line inputs, but then that's all you get with the SB Live as well. They put the money into the A/D converters, which is where you want it. There are other cards in similar price ranges that also get good reviews (Terratec, Echo), but I don't have much experience with them.
One potential downside with the audiophile is that you need an external pre-amplifier or mixer. There is no "mic" jack like there is on the SBLive. Of course, if you really care about your sound at all, you shouldn't be using that mic jack! You should use the line jack with an external pre-amplifier or mixer. However, I don't know what your budget will allow.
There are some cards on the market that have preamplifiers built in, although I am not sure which of the cheaper cards do. Another line that is getting a lot of interest lately is the new E-MU cards. E-MU is owned by Creative but is geared towards folks like us instead of gamers. The initial reviews seem good, and there are different options depending on how much you want to spend. Anyone tried them?