Boo,
You should consider a Ketron Midjay. It is light, sounds wonderful and will play midi files, MP3s, WAV files plus styles. You can use your current keyboard as a controller if you want, or purchase an inexpensive dedicated controller keyboard. If you just play the sax, all you will need is the Midjay.
There will be a learning curve, but that will be the case with any new board. Call Hank and talk to him about it.
DonM