I like my Zoom H2 and I like it even more with 4 line inputs.
This 3 minutes instruction video shows the way you can make
yourself a 4 track fieldrecorder. I don't say its easy....
but it can be done in an evening. Now I can record 4 channels
from my computer audio interface when the softsynth is running.
The quality is great. Good luck!
http://www.vimeo.com/1725654
http://www.youtube.com/watch?v=N1vJq13ukrk