Check some of these sound cards out
http://www.zzounds.com/cat--PCI-Audio-Interfaces--2421
I've got a delta 1010LT, a pretty hi-fidelity soundcard, with 8 rca and 2 xlr inputs...I dump 8 tracks recorded on this baby:
...through the 8 inputs into audition (cep) and the results are amazing (by my standards anyway, I dig lo-fi stuff)
Here's a sample of something I did recently:
Song
And here's your sample, I reduced the hiss and eq'd it little bit and made it louder...the problem with the current hiss reduction algorithms is that it kind of muddy's up the song.
Your song sort of fixed