I use 61 keys, and my split point is at D4, which gives me 2 octaves for bass and 3 for chords. Many "piano" players prefer less bass area, but I'm a bassist first, so I like the flexibility of the wider range. I also lower the octave of the right hand ... it suits my vocal range better and makes a fuller sound.
A typical setup for me is LH bass, RH Rhodes (with a string layer), and an acoustic drum kit. I can play all night like that and never miss the arranger features. My audience, however prefers a little "more" so I mix in some arranger styles, some MP3 backing tracks and some straight piano (usually electric) songs.
It's a good compromise for my stuff.

Regarding the 2 octave bass range - It's like having a 5 string bassist with me. He can hit the low "C" and dance around in the upper register when he's feeling "melodic" or "McCartney-esq!"
Good luck, however you do it!