One can only hope...
Truthfully, the sound technology has improved greatly between the 2000/2100 and the 910.
I just gave up my 2000 ( I still have a 330, a T2 and a T3), but before I did, I checked it out. It sounded wonderful! I was starting to have second thoughts, so I fired up the T3 and used the same style and the same chords, etc.
The 2000 sound was great, but the T3's was too, albeit in a very different way.
The T3 (and 910, by assumption) uses different samples, different voices and different effects to make a sound that is more spacial, clearer, and, to my ear, more sophisticated and modern.
The only way to tell if the new sound is for you is to try it for yourself. If the 2100 dies again, this is a forced choice, but I recommend looking at the options regardless.