SeaMonkey has been my browser of choice for almost a year I think.
It's like FireFox but it's not a resource hog.
Basically I feel like I'm living in the days of FireFox 1.5 with it, when everthing was fast and smooth.
http://www.seamonkey-project.org
Yes, the default skin is shit but you can download better ones.
Unfortunately, just as FireFox, it has the whitelist IDNs thing. Aside from that I don't have complains.