Hi !

I have a K2000. The good points of the instrument are :
real good sounds
compatibility with a lot of samplers and .wav
very friendly user interface
The bad points :
You have only one effect processor. For example, you can't apply a reverb on a part and some chorus and reverb on an other part in a sequence. In Frensh, we would say it's all or nothing !
The polyphony is not enormous compared to others machines. Fortunately, with one or two layers the sounds are rich anyway.

Bye and good luck for your choice !