Talking about long stints of typing...

> What put me off the N810 was reliability and Flash video playback. After 
a couple of years using the N770, a crashy web browser was no longer 
acceptable, and Flash video had to be smooth as silk whilst streaming 
(otherwise what's the point?)

AFAIK N770 Browser crashing was mostly because 64MB RAM is just not enough 
for www-pages with JavaScript and/or Flash (i.e. crash = Glib used by the 
Gtk widgets and some other components abort()s the process when an alloc 
fails and things built on top of Glib expect allocations always to succeed 
while process is alive, so it cannot be even changed).

My N810 has 128MB of RAM and is much better, the browser seems really 
stable. There are still some sites with JavaScript and/or Flash which can 
consume considerably more than 128MB (it's easy for web designers to do 
that with either JS or Flash), but on N810 they (at least normally) seem 
just to slow everything to crawl instead of browser crashing.  I avoid 
those kind of site as I don't see much point in ruining my browsing 
experience by pages bloated with dozen(s) of ads etc.

Flash video is pretty far from silk smooth, but to me it's usable enough
(10-15fps depending on video and what other active content the page has).

Anyway, the selection is more of a matter of taste, whether one want's 
something that fits better into pocket or something that has more power, 
you cannot have both, at least without seriously crippling how long your 
battery lasts.