Nice adviceWhat kinds of things do you want to do with it? What DAW do you have? How much money can you spend?
You can get anything from a launchkey mini for around $100 to an ableton push for like $700 (if you want the ultimate ableton experience) to an akai mpc for $200-$1600 that comes with more or less it's own dedicated DAW to basically a grand piano replacement keyboard for a few thousand dollars.
And then there's MPE stuff like the Roli Seaboard if you want something different.