Sorry Paul, but it wasn't too far from the topic. Why not just use the computer to make music. There are a lot of very good sound cards out there such as the SW1000XG which has essentially the same synth as the high end Yamaha keyboards. XGworks is a very good sequencer for this card. Cakewalk Home Studio is a very powerful sequencer for the price or even Cakewalk Express which is very cheap. Any old midi keyboard will do as a midi controller if you need one.

Bryan