I'm all for Maxthon, an IE based browser. Becuase it's an IE based browser, most websites coding is compatible with it. Maxthon has impressive speed and many features like tabbed windows and a built in popup blocker. Also, any dramatic changes to IE affects Maxthon. When I downloaded IE7 BETA, it affected Maxthon.
Here's a list of the features. Keep in mind that it doesn't list them all:
http://www.maxthon.com/features.htm