I've been using Cubase SX for a couple of years now with lots of success. They say Cubase 4 (the newest version) is out of this world and is a complete package with plug-ins anv VSTis. It runs around $1000, but you can get an educational discount for around $400, or a slightly lighter version for $200 called Cubase Studio. (the main thing you loose with the lighter version is professional scoring).

Obviously you'll have to show educational proof, or just buy it 'for' your son.

Chony