I've owned two ZX-9R's. The '00 was my favourite sporty touring bike, just marginally uncomfortable compared to my old VFR's. I think few mods could have alleviated that. Unfortunately it was stolen and severely crashed by the theif.
I plan to buy another one in the future. Since my '00 I've gone through a variety of bikes. '01 FZ1, '99 VFR, '01 VFR, '05 GSX-R1000, '05 DL1000. They've all been great, but I end up comparing them as having some shortcoming to the ZX-9R. Minus the DL, which has no comparison for a fun street bike to tour on with a passenger. :smile