The Mellotron Group

Thanks for your responses. I understand that M-Tron Pro and a controller may very well be the best option for recreating Mellotron sounds, but I'm looking for the convenience of an instrument that's solely dedicated to Mellotron sounds, and everything is self-contained. I guess I'm leaning towards the M4000D. Poly aftertouch may not exist in a real Mellotron, but having a nice keyboard makes a difference to me. Any Memotron owners want to chime in?