Does it have to be JUST a keyboard, because I’ve heard good things about the Studiologic Sledge, but that’s a synth with a keyboard. Similarly, the Prophet Rev 2 is one of the better keyboards out there today, but it comes with that darned synthesizer attached to it. I mean, if you want GREAT, then the Roland D50 and Yamaha DX7 have some of the most highly praised keybeds of all time, but you have to buy a retro synth to get them.
If you want decent keys without too many frills, a Nektar Panorama T4 will do you (49 keys). I remember you were asking about sequencers recently too though, and you can get the Arturia Keystep Pro (49 keys) which just came out, and has enough sequencers built in that you could make a full song out of just playing and sequencing on that. Similar for the Novation Launchkey, which comes in 49 and 61 note versions.