I use my 9300 for this. I have tried two ways thus far:
The first was to use a PCMCIA sound card and wire it up with a mixer.
I used thishttp://soundblaster.com/products/pro...ct=10769&nav=0
This worked pretty well for such a cost-effective solution and I would recommend it if you're on a budget as you can definitelly get a complete setup for under $200. I had enough money left over to buy a decent mic for it all. The audio I made sounded great, except it was only stereo. This is okay for live recording, but it is impossible to multitrack with this--digitally at least, since I had to do all the tracking through the mixer.
So... I got this bad boy instead:http://www.musiciansfriend.com/srs7/...se_pid/184131/
and I have not looked back. Firewire is F'ing sweet, and fast, and clear as day. And there are much fewer connections to cause line noise. There are cheaper firewire interfaces if you require. I have a need for 10 tracks so that's why I bought this. Plus, with the included software, it seemed like a no-brainer (although I've been enoying Adobe Audition a bit more than Cubase).
So there you go. That's my story; let me know if you have questions. I definitely recommend as much ram as you can afford for your 9300. I have the 2Gb and it's well worth it for what I do.