Opera on the Blade
>(It was originally an Orange San Francisco Mk1. Now it thinks it's a Jelly Bean ZTE Blade.)
Recently upgraded from my Blade (what an amazing little phone) to a Huawei G510.
I'd installed this when it was in beta (and therefore could sit alongside Opera Mobile). It worked, and speed was iffy but fine. The issue I had though was that it needed to sweep away about 6 of my biggest apps in order to fit. So yea, stick with Opera Mobile. You'll be better off in every respect.
That said, being a Blade owner, I know how much you'll be used to running the latest and greatest, and being amazed that you can!