OK-I think I figured this out-for now. I sold my WK-1800, and am going for an upgrade to either the Casio MZ-2000, Yamaha PSR740, Roland EM2000, or the Korg PA-80. I can get away with a 61 key keyboard because I have a Fatar SL-880 88 key weighted action controller. This will be useful in playing piano parts, and the synth action of the arranger will be good for everything else. I will be able to hook both keyboards together, and I have a two tier stand. My only dilima now is what to choose. I look foward to hearing updates on your long term impressions of the Casio MZ-2000.