I was going to add that you seem a little like a car buyer trying to decide between a convertible and a minivan. Well, I got a Ford Aerostar and a Cavalier Convertible. Since you are just getting you feet wet in arrangers, look at a Yamaha PSR-2000 or maybe a Yamaha PSR-740 if you sing. If you don't sing, try a used PSR-1000. If these are still too pricey, get a cheaper Yamaha, as long as it is at least "touch sensitive". What do others suggest?
P.S. That Novation KS4 Analog-Modeling Synth on ebay is a great deal. It's not an arranger, but it does include rhythms and includes a vocoder. I am tempted, but am holding out for a G2.
[This message has been edited by Clif Anderson (edited 12-12-2003).]