One of the best pieces of gear I’ve bought this year is a Kurzweil Midiboard. This 88-key midi controller is sports fantastic weighted keys that are are among the best I’ve ever played and the very rare polyphonic aftertouch. It really has changed how I play and made sitting down at the keyboard far more enjoyable.
The Midiboard is heavy (100lbs!), so I’m not sure i’d recommend it for gigging, but they’re not terribly expensive so they make a perfect studio controller.