Well, if you think you can get a 64-voice polyphonic,
Yes, 64 voices@48KHz is surely possible.
16-Part multitimbral synthesizer with 512 instrument sounds, 8 drum kits
It could even be 64-Part multitimbral, doesn't matter at all. And a 200 Mbyte Soundfont can have much more instruments (and drumkits) than the 2MB of an U-110.
, 40 built-in effects
No problem - they won't be needed all at once.
and better sounds than Roland engineers
To make better samples than those in the U-110 is absolutely no problem. That has already been done - by Roland engineers and by these ppl.
then I will be the last person to stand in your way.
Btw: The U-110 has only 31 voices and 6 Parts.