Thank you so much~~.
I've read the matrix and still can't decide.
800SG is more attractive to me, if it's really only need $399, and includes Premium Wacom navigation stylus, Castelijn & Beerens leather cover.
http://www.bestbuy.com/site/IREX+-+D...r800&cp=1&lp=1
and now only 800S available and it's 599 USD, which is much higher than prs 600.
I posted a question here,
https://www.mobileread.com/forums/sho...hp?t=71644,but no one answer me
PRS-900 vs 800S
normal touch screen vs WACOM
1024*600 vs 1024*768
8 grayscale vs 16
more format supported vs less format supported
music supported vs no music
hard to decide