The problem with incorporating samplers and wanting huge wave roms is that the price has to increase too. I used to say for years that technics should incorporate a sampler. After using the 9000 and 9000pro, now I'm not so sure.

The Kn6000 had 32 MB of wave rom, same as the psr9000. The 6500 has 48 MB of wave rom, same as the 9000pro. The 6500 with both cards has 80 MB of wave rom.

Is it really reasonable to try and compare the previous generation model of one manufacturer with the not yet finalised next generation model from another?

The Tyros was provisionally announced at 'around' 96 MB of wave rom at Frankfurt. If the 9000 is anything to go by, there must be some expansion available too, maybe ram, maybe flash, we don't know yet. The 7000 'may' be 64 MB but 'may' have space for 4 expansion cards, this 'may' be an additional 64MB, we don't know yet.

It is all academic since what matters is whether the sounds suit you personally, the numbers are of interest only to people who read brochures rather than play.