Tip:
Make sure you listen to the demos on a quality audio system, as computer speakers just don’t cut it.
The DVD (With the Dolby Digital soundtrack) can be obtained from the Yamaha Club UK.
BTW if you can’t hear a lot of difference between many of the sounds between T2 and T3, (The original T2 NOT the T2 voices on the T3) then you most definitely require a better audio system. (Even the mp3 shows the difference)
As to whether it’s worth upgrading; only YOU can decide that, but just make sure you play and hear it live before making a decision.

Bill