Well my B2RE has arrived, and I can say for the money you are getting a hell of a lot of amp. Its now installed in a Gator so it wont be getting trashed anytime soon, and looks quite cool as a mini stack. I too am using a B410 cab.
One rather annoying thing about it - the feet of it. Which if you are sticking it in a 2U rack need to be removed appear to be nigh on impossible to remove. One came out, and all the other three did not as they appear to have been bolted INSIDE the case in the amp, which I found out after having to remove the rubber from the screws. A minor annoyance as it will never come out of the rack, and putting the rubber back on if I DID remove it from the Gator would be pretty simple.