Actually the Tyros is only about 7 lbs lighter than the PA2Xpro...but, it is easier to manage, and would require a smaller, and therefore lighter, road case.
The Roland G-70 is the pig...it weights 45 lbs, and in a road case, is quite cumbersome to move.
Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.