IMHO it doesn't fit your needs.
The browser is not very fast but that's probably gotta do with the M92 hardware, while it's good enough for reading purposes, it's a bit short on power for the modern web.
It's not completely stable either: some sites work well, others give problems (I haven't tested that many). If the site you want to read works then yes, you can read it fairly well on eink and it's nice.
Also it doesn't support tabs so only one page at a time.
Anyway, between all the problems, if I really want to read a long article on the web I just print it to PDF and read it on the M92. This works much better.
The M92 is a fairly good large ereader, just not a very good device for browsing the net