I owned a T3 and swapped it for a T5 when they came out. Biggest mistake ever. The T3 was/is a much smoother sounding board than the T5. Okay, the T5 has some extras (Organ World and Ensemble) both of which I never use but the T3 in my opinion is a sweeter sounding board.
I also have a Ketron SD7 which to me is far better sounding than the Tyros so consequently the T5 sits in the corner probably feeling unloved.
Can't bring myself to get rid of it though as I still get some enjoyment from it.
Probably the last Yamaha I will ever buy.
Alan