Hi guys, I thought I would just add a comment seeing that I used to own a WX2, I think it was more comparable to the WK4 than the WK2 as the WX2 was a top end keyboard in it's range where as the WK2 was an entry level to the WK series. I liked the WK2 it was a very nice keyboard with some great sounds and highly recommended, as already been said, GEM keyboards still can hold their own even with today's units.

Good luck in your findings,
Take Care
Danny