Thanks guys!

George,
Yes, I have heard about the WK2OR.
One of the things that I don't like is the fact that it doesn't have standard 16 track sequencer which I think should be part of a good instrument.(no .mid recordings)
Also the GEM is not so popular as KORG or ROLAND an therefore you can have hard time finding additional styles on the internet while KORG,i30 for example has a huge library on internet.
I think these things are quite important nowdays.
Probably I would go for a used WK2or but I don't think that it is worth buying a new one.
Of course all this is just my opinion and for sure there are many who would disagree.

Thanks Georges