Opera 8.5 is quite easy to use but it doesn't support Netvibes yet which is a pity. I also have problem setting the font I like in Opera. It has selection for author and user mode, tried both, set everything to Tahoma but fonts in gmail still showed up differently.
Flock on the other hand seems a bit more responsive than Opera especially at startup although the setting of favourites is still a problem.
I think I need a good one with everything in it which is Firefox and Flock can be a supplementary one whenever I want to open 2 browsers to view 2 gmail accounts simultaneously. This is a logical arrangement as Flock can be used to blog instantly. I have great hope for Flock although there is a long way for them to go.