I'd avoid the DS-1, I had one for a while (first stombox I ever owned) and it drained the tone quite a bit (when on and not-on). It wasn't absolutely terrible as some would have you believe, but I ended up selling it and getting a Visual Sound Jekyll & Hyde.
The Blues Driver is great, but if you're into metal distortion like the Behringer, it's not going to be enough gain for you.
I've heard very good things about the Blackstar HT-DistX, the Electro Harmonix Metal Muff, the MI Audio Crunch Box (not a metal pedal, but still high-gain), the MXR M116 Fullbore Metal, the Visual Sound Son of Hyde (not metal, but still high-gain), and the Zvex Box of Rock (not metal, high-gain). I know those are much more expensive pedals, but I imagine you're going to end up replacing or modding the DS-1 at some point, so you'll save money (and time) in the long-run.
10/23/10, Shoreline Amphitheatre, Mountain View, California (24th Bridge School Benefit)
10/24/10, Shoreline Amphitheatre, Mountain View, California (24th Bridge School Benefit)
07/11/11, Paramount Theater, Oakland, California (Eddie Vedder Solo Show)
10/22/11, Shoreline Amphitheatre, Mountain View, California (Eddie Vedder Solo Show, 25th Bridge School Benefit)