Yamaha PSR740

Best Feature: Effects

This model has five DSPs, each with 35 basic effects (reverb, chorus, echo, delay, EQ, compressors, modulators, etc.) and up to 16 parameters per effect (LFO, filters, phase, feedback, etc.). There are also 102 preset effects. Along with the ability to layer up to 18 sounds this makes it one powerful synth. Higher models have even more. And you don't need to turn on the arranger stuff if you don't want it.

Bryan