Samir,
I may agree on what Ahmad said about the E-500OR'S problems like the tempo(Ahmed I never saw the second problem in my keyboard)but the E-500OR is good only for choosing sounds when you want it very fast but not as one man band meaning you gig. but if you are going for a keyboard that have the best "functions" then you go 100% for the X1.if you are looking for the quality of the sounds I suggest you check both the X1 and the EM-50OR(the E-500OR is no more in sale...only the EM-50OR which carry the same sounds and more).the WK2 is good but misses many things like a sequencer.I heard their was the WK3 but I don't know if GEM still sell it or not(it have nice specifications)

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vic

[This message has been edited by vic83 (edited 12-19-2000).]