Firefox Mobile (Fennec) was in Alpha status for a reason, but now it's an official beta release! Pinch to zoom, sync, add-ons and more!
It may not replace your current browser (after all, it's still in beta), but it's stable enough to try it out for a while.
Warning - app size is 29MB and after 2 web pages, my data is up to 14.5MB.
Not sure if you can move it to SD card since my current ROM allows that for any app.
Download Firefox for Mobile (Link Points To Mozilla's Site)