I haven't tried it but I can't see going wrong with ProTools Free. You're limited to 8 tracks but with some creative bouncing that shouldn't be a problem. The only drawback is if you're brand new to audio recording, the learning curve is pretty steep. Cubase VST took me maybe a day to figure out the basics but more than a year later I'm still learning..and that's after having the midi version for 10 years.
The hardest part about recording audio digitally is getting your head wrapped around how to print effects so you can free up your cpu, and realizing that when bouncing tracks, you can't do it in real-time.