Opera, up to 12 has the best tab management, groupings, etc that I've ever seen. It's a real shame the new webkit based Opera still isn't up to par. As such I'm in the same place as you hoping for Opera's tab management but left with hundreds of unidentified tabs in Chrome. Plugins help a little bit but nowhere close to Opera's innovative management. Hopefully they'll restore parity soon.
I'm disheartened by their conversion to Webkit. Tab grouping + session save is one hell of a killer feature : I used to archive websessions in order to track my references when writing a academic paper.
I've switched to Firefox from then, but it's not as convenient as Opera12.
