Just a word of warning - the operating system of Yamaha Tyros machines is a million miles away from those of the Technics range of keyboards and is rather more complex. Were I considering a change from your 6500 I'd go for a Technics KN7000 secondhand of course or perhaps a Korg Pro PA3X which uses somewhat the same logic as the Technics machines.
hi... both Ray and i have experience playing the latest models of Yamaha. I dont think we will have too much trouble . WE have a friend who is very clever with them as well so he will be a great help to us.
i know i can ask on here if i have any issues , that helps a lot.