You and I have very similar requirements and reading habits, it seems
My Pocketbook arrived yesterday and I've been testing it out today with all my .html fanfiction files. I've only upgraded the firmware so far, the wrist page turn FB Reader thread confused me, so I haven't done that one just yet.
For fanfiction the PB360 is perfecct as far as I can tell! I haven't even tried a real book or PDF in it yet!