Stock and Dolphin....I was using dolphin for a while, it is an amazing web browser, the easily changeable theme colors, little apps for it...the overall polished look. And 4.0 is supposed to be coming out, or beta, I can't remember which.
But I am on stock for one main reason...dolphin side bars are a bit intrusive when navigating a website, I go left or right and the bookmarks or apps come out instead of it scrolling to the side of the website I want to see. Other than that, dolphin is awesome!