I find the BB stock browser quite good. One thing that bothers me (a lot) is that I am not able to scroll right and left by using a shortcut as opposed to the scrolling ball.
MiniOpera was great that way (I used it on a SE K850i). However, each time they would release a new version, I would lose the bookmarks (the new MiniOpera would not see the bookmarks set with the old version). Since I am not using the desktop version of Opera... I couldn't save my bookmarks. The second issue I have with MiniOpera is that it wouldn't play embedded video. The BB browser is not great at that but at least it does the job every now and then.
If anyone knows how to scroll left and right with the BB browser (column view won't do the trick, scrolling is still needed), telling me that would make me happy