Roel,
I agree with your evaluation of the Tyros and also the quality of the internal styles. I suggest you to try the styles made by Yamaha for the PSR 3000: even if they are all derived from the Tyros own styles, in most cases they have been reprogrammed with better results.
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Korg Kronos 61 and PA3X-Pro76, Roland G-70, BK7-m and Integra 7, Casio PX-5S, Fender Stratocaster with Fralin pickups, Fender Stratocaster with Kinman pickups, vintage Gibson SG standard.