Good arguments on both sides so it comes down to what you're expecting. If you already have the N800 then you won't get much with the 810 except for the integrated keyboard and GPS. I wouldn't change but might have picked the 810 to start with. However I personally don't get excited about GPS, I can always find my way. I do have a BT GPS which works very well (better than what I hear about the 810's lag). I don't see the point in turn by turn driving assistance 99% of the time. Might be fine for certain situations but day to day it is a waste as far as I'm concerned. I don't use GPS for help getting there, I use it for fun to show where I've been, maps are interesting but 'turn left' is a gimmicky distraction. This past weekend I needed to drive a couple hours into a back country area that I've never been to. A quick google before I left was all I needed and the GPS wasn't looked at until I got back to plot out my tracks just for reference.

I keep my typing needs to a minimum on the N8 anyway so a keyboard would be nice but not essential. Bookmarks, icons, and the contact list for the SIP phone are what is most useful for me. The 810 wouldn't improve things enough since I already have the 800. But it has a coolness factor if that was important. Starting over I might get the 810.

now WiMAX might entice me to upgrade but I'm not holding my breath since I'm in Canada, the land the primitive and evil cell providers. I don't own a cell, the SIP function of the N8* is the critical feature so WiMAX would be a real benefit since cell data up here is out of the question.