I have an Alesis DM8 kit and I just figured out that I can record midi via the USB port. If you need some drums, hit me up.
Saw that kit for sale for £199 the other day (in a real life "you can try it" shop). My lad was VERY interested.
I've only tinkered with the built in drum kits a little. I bought it from a friend after I sold my acoustic kit just so I can keep my chops up.