What other guys do it?

61 note PA1x has speakers, 61 note Ketrons have speakers, off the top of my head, I can't think of anything other than the T2 with 61 and no speakers.

There certainly doesn't seem to be much demand for them. Unlike 76 no-speaker arrangers. Plenty of those... EXCEPT Yamaha. Somehow, Yamaha seem to have got completely backwards to the rest of the arranger world.

You want a 61 note G70...? E80 if you can handle the weight, E50 if you can't. You'd be surprised at how good the little E50 is, and the speakers don't make it any more heavy than your beloved PSR3K (soon to be S900, NOT T2!)

The need is already filled. But I guarantee that IF the need ever arose (for a 61 G70), as vocally as the 76 T2 need, Roland wouldn't ignore it as long as Yamaha...