The S90 is actually a huge step up from the S08 and even the S80. It has all the motif sounds and performances plus a special sampled piano exclusive only to the S90. The overall sound set is more usable than anything else I played and there are tons of free sounds as well. I searched for over a year and checked out everything available (ie Korg Triton, Roland XV series and the new Fantom S88 (which is a huge disappointment), The Kurzweil k2600 ect.) For the price, you can't beat the quality of the S90. The acoustical stuff on the S90 will knock you socks off. It really is a very powerful synth.

The S08 although similiar to the S90, lacks many of the same sounds. They use different formats to sample the sounds. Regardless of what I or anyone else think, you have to check things out and decide for yourself. The only bad decision you can make is the one thats not right for you. Good luck!

Chris