Tony,
right now I only have 2 plus a Roland A-800 Pro controller I use with
Dan's vArranger. One time I had 4 - way to many to really make use of
on a daily basis. But it was a lot of fun doing side-by-side comparisons.
The only keyboard I have not owned is a Ketron - I almost bought the
SD5 and did own the MidiJay module at one time.

Deane