25lbs is a problem? Try the full featured 76 note BK9, at 20lbs!

Roland did an amazing job of putting the 45lbs G70 on a starvation diet without losing much (and adding a ton of new stuff). My BK9 has been easily as durable as my ‘built like a tank’ G70, and the action, though not QUITE as good as the G70’s (the finest semi-weighted 76 action ever made!) is easily as good as a PA4X (albeit without aftertouch).

To be honest, I have my doubts that the speakers in the SX900 weigh more than a couple of pounds…

Perhaps a case with little wheels at one end might make moving the SX900 easier?
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An arranger is just a tool. What matters is what you build with it..!