I really don't find there is a lot of difference in height myself but fit is such a personal thing that it is hard to say which bike is going to fit you the best. I personally like the fit of the R6 and the GSXR. I didn't like the seat on the CBR and the whole seating position sucked for me on the Kawi. I got the R6 because it fit ME the best but if I had seen the 08 GSXR first I probably would have ended up with it. I love that white/silver colour scheme but I don't regret the R6. You will have to sit on all the ones you are looking at and decide yourself, you're the only one who can tell which one you can live with every day.
'08.5 Mazda 3
'90 Laser RS-T
'07 Yamaha R6