Ian,

I agree I was going to write a bit on T4 v Audya, the T4 has got so much more, so easy to use and the samples and styles are way ahead. One simple thing with the Audya when you play style you don't even know what group of styles you are in, the T4 never fails, the style led is lit up and press it wherever you are and it will take you back and you can see what style you are playing, might appear simple but Ketron could never get it right. The attention to detail on the T4 must surpass any other KB.
Tostie brilliant gets the best out of the T4 just like Mr T. but in a different way. Just wish I had taken more piano lesson instead of playing with the girls.