I looked at the ones reviewed on the site a while back and they seem pretty good.
Review: Maximo iP-HS1 iMetal Headset | The iPhone Blog. I usually end up carrying the ones that came with my iPod or a behind the head type ones if I'm doing something where the buds might fall out, simply because I don't usually need to be tuned out and be deaf to anything outside me, but when I wanna relax I use the in ear isolating kind, or on a plane or other noisy place. By far prefer the latter, cause at least for me they're more comfortable for long term use.
Anyway, TiPB reviewed the ones above pretty well and I haven't really seen anything bad about them from what I've seen. I like the bag and extension too.