I felt an XP-30 for the first time this past weekend and I prefer the XP-30's feel over my XP-50. It looks like the only difference between the 50 and 30 is that the 50 has disk capability and a sequencer. But the 30 has more sounds and a better feel. If I'm only using the xp-50 to play live, and I'm not making good use of the sequencer, perhaps I ought to trade my XP-50 for an XP-30.
Are there any XP-30 users out here that want to trade for an XP-50? Would it be a fair trade?

Hmmmm

I wouldn't make the trade. The XP50 is the oldest in the line of XP synthes. Plus the XP30 has some patches the 50 doesn't have.