Hello one and all

I am currently searching for a tablet pc, but I am not willing to pay $500+ for one. I was looking around, and the "HiVision SpeedPad" and the Marvell “Moby” Tablet were possibilities, but according to the sources I have found, they aren't released yet. Does anyone have any suggestions? Any experience with the Tablet PC would also help.
Things I would like for it to be capable of doing, (whether bought, downloaded, or 'hacked')
1 "virtual" instrument or native sound editing software (like FL Studio/similar although FLS you have to buy)
2 ability to output/input audio to/from my desktop computer so I can edit and piece things together
3 And basic internet uses (email, google, etc)
I don't care for webcams, will probably never be used if it comes with one, and I wouldn't use this for games (That is what my desktop is for) I would prefer to spend below $200 on it, but possibly going up to $300-$350.
As far as OS is concerned...I am not familiar with the Andriod OS, and currently I am running Windows 7 HP on my desktop. So basically there, I am open for suggestions...Windows, Android, Linux etc
Thank you all for helping