Stephen - I'm not saying that k-meleon is the best, I only think it is.
I particularly like KM because of the almost complete control that you can have over the gui including the menus, icons etc. There are many extensions, the majority are written by KM users and it is relatively easy to write and add your own (check out the forum). These extensions include some equivalents of those in FF : Adblock, Cookieculler etc. and a special mention goes to the Policy Manager which works like NoScript but imho is
much better.
KM is also skinnable and you can even easily write your own skins !
The community is really lively, helpful and friendly, something I can't say about some other forums (not DC of course). If you have an idea for a good extension, just post it on the forum and usually in a very short time someone will write it for you !
KM is also one of the fastest browsers that I have tested, it loads almost instantly and doesn't take up too many resources unless you leave a lot of tabs open with Flash content.
And by the way, the 1.5.4 version came out
today