Excluding the option of a Bass Player and Drummer moving into my home. I was wondering what are the best ways to get the Backing Tracks for improvs etc. ? I don't really want to learn songs of others but be more creative in what I wish to sound like.

I have Band-in-the-Box on the computer and can create or download midi songs to play over, which I usually burn to CD and play away from the computer. I also have purchased a few ready made JamTrax cd's but find there are not that many out there or I am not searching the right areas.

Lately I been thinking of getting a Drum Machine to create my own beats in the background although then I guess I will be out the other instruments BIAB can add in, a ALESIS SR-16 to be exact if it's worth the time.. anyone have one?

Any other options I have over looked or suggestions on BITB or the ALESIS SR-16?