61 keys is also problematic for me because I run out of real estate because of my style, though I am not a busy player by any means......88 keys is too many ivories, & 76 keys are just right...
I play a unique style with a few chords like Am/C which if I do not have the 76 I literally cannot remember how I am supposed to place my hands. It is a pure feel thing.
I can play a 61, but for every day use, 76 has always worked for me best
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Steve A
http://www.stevealtonian.comKorg Pa4x 76...TASCAM DP24 & DP24 SD. Studio One 6 Professional with a FADER PORT 16. 1969 Yamaha FG-300 Yamaha Red Label Nippon Gakki. Breedlove American CME 25. Neumann TLM-49