IE and Safari both are out of the question - please DON'T mention them. I'm a Linux user and I can't use either of these browsers, even if I wanted to (which I DON'T).
I use Firefox and Chrome/Chromium regularly. Firefox is my first choice, but it can be a resource hog. Same is true for the other 2 that I've mentioned. I have no patience, so I'm looking for something that's relatively quick.
I use Opera regularly on my iPhone, but I haven't (so far), found the desktop version to be super-speedy.
I'm looking for something that I can open quickly if I need to look something up, check my email, etc., when I'm running other resource intensive apps. I will probably only use it in those specific cases unless I'm extremely impressed (I'm a huge fan of Firefox).
I've also tried rekonq (many people have never heard of this app), but I'm not really a fan of KDE and I'm not sure whether it works on other desktop environments.
Any suggestions?