Fran
I have been using a KN2000 for many years and I have found it perfectly suited to the type of music I play. When my original started to show its age, I found one on ebay, near where I live, for $300, demoed it and grabbed it. I have used it ever since. I has really usable electric pianos, organs, keyboards, basses, pads, etc...and one of the demos has an amazing piano that I have been unable to replicate using the on-board pianos. I usually split the board and play left hand bass (it does not have on-bass) and layer the right hand with pianos/organs/brass, etc...turning the layers on and off as needed. I use the accompaniments sparingly - either only drums or some minmal three piece rhythm section with me on LH bass. Recently I was playing a wedding with a sax and a conga player. I happened to dial in an acoustic bass/acoustic piano (piano 1, I think) split and they both commented on how natural it sounded and the blend with the two other musicians was great. I had never used that particular set-up before but I will again, rest assured.
While I am in no hurry to replace the board, I am waiting to see the new kurzweil SP-4 stage piano. I know its not an arranger, but its compact size and light weight coupled with the (IMHO) stellar sounds taken from the PC3 makes it an irresistable 76 key portable board.