I really think the best bet is to get a good digital synth for keys and a separate controller (APC40 if you use Live, Remote Zero if you don't etc.) for MIDI.
I spent three months

shopping for a current model MIDI controller keyboard and couldnt find a single one that several people didn't have major complaints about except maybe the Cakewalk (Roland). However, other than a great key action (which I can personally attest to), I couldn't really find any information on those one way or another so I gave up.
I ended up getting a used Yamaha CS6x (Merely OK as a synth but very good as a MIDI controller!) and a new Akai APC40 to control VST's in Live. I will probably add an MPD or Korg padKontrol and an additonal hardware programmer for synths (Remote Zero or PWS editor) later but it's a good start.
It might take a bit more work to figure it out but a good digital keyboard synth (Roland XP or Fantom, Korg Triton or Z1, Yamaha EX, CS6x, MOTIF, Kurzweil K-series, Kawai K5000 etc.) is a definitely a good option to look into.