Diki...thanks for the info about the mixing situation. this may make me get the E-60..76 keys, lighter, and I would use an outboard harmonizer. Don't really think I'd use the harmonizer much, but have never had one, so that might change. 50 lbs is no problem...I believe the MS-60 I've been playing for years is close to that.
Do you know about differences in memory between the E-60 and E-80?
thanks,
R.