I've spent time using Stock, Dolphin, Opera, Skyfire, and Xscope. All of them have been my favorite at some point, except for Opera. I currently use Xscope as I believe it is by far the fastest at loading the web pages I visit. I've accepted it's lack of polish in menus and stuff as a small price to pay for performance. Skyfire's got some cool features but I found them annoying at times and the zoom is strange when first visited a website. Dolphin was great for a while but they kept changing their menu system to the point where it's bloated and ugly. Stock is okay, but I went away from it because it's sloooow compared to Xscope. Also, stock does something weird to text when you scroll. On any page, such as this one, look closely at the text. Now press your finger down as if you're about to start scrolling and watch how the text shifts pixels! WTF is that about! It looks strange and has always bothered me. It doesn't happen in other browsers as far as I know.
My vote: Xscope Lite