Alot of the time, when I use accompaniment tracks with live playing, I do all the initial recording with Pro Tools. For example, for a band with keys, organ, bass & drums, I recorded a drum loop (to keep the drummer on beat), guitar, brass, synth, flute, etc, and sometimes vocals to help out the group/choir.
Then, I will export all the tracks into a Roland 1680, which is very easy to control during a live performance. You can quickly adjust volumes while playing, and you get a separate volume & mix for the drummer.
I would suggest using a 1680 for performance, and if not, then Pro Tools. I've seen 1680's on ebay/craigslist for under $200.
Just my 2 cents lol