I've spent too many years in envy of fellow band members able to simply carry (in one hand) their music instrument to/from rehearsals & gigs, while I had to struggle carting around my 70+ lb keyboard, suffering back aches along the way to go back to that. Now that my keyboard transport weight is finally begining to inch in the direction of my non-keyboard gigging musician brothers and sisters, (Tyros2: 32 lbs) no longer am I willing to transport a keyboard over 40 lbs. Considering the fact that a keyboard's appropriately protective case can easily weigh 20+ lbs, a 49.6 lb keyboard like the Roland E80 with appropriate case will weigh 70+ lbs. In addition to weight, the keyboards dimensions (length/width & depth), bulkiness, and balance ergonomics, are other critically important transport factors to consider. It's far more difficult to manuever a 76 or 88 note long keyboard than a shorter 61 note one, and if the majority of the keyboard's weight rests on one end only, this makes it more difficult to manuever still. Balancing keyboard sound quality, with transport weight and size (61 vs 76-88 keys) are important considerations for the gigging musician. - Scott