Maybe you had see webbrowser market share in our blog.
You also find top 5 webbrowser ...etc topic from Google.
I think maybe you can consider my suggest.
Simple,flexible or more function.
Simple:
You can consider IE8,Google Chrome,Arora or Opera.
It's simple and fast.
Flexible
You can consider Firefox.
It's opensource and get more plugin in the world.
More application Function
You can use other browser include IE...etc layout engine.
Ex:
Support BBS/Web
KKMAN
PCMan
KKFOX
Support more layout enigne
Lunascape
Support more function,like bookmarke group...etc
Maxthon-MyIE2
Sleipnir
Avant Browser
Crazy Browser
Acoo Browser
TheWorld Browser
QtWeb Internet Browser
Without install browser
GreenBrowser
I had tested over 20 browser in my computer.
It's my little experience. You can also give me comment.