Pierre
Stratologist
T Rex Mudhonny: Well it's muddy, thick and mean. Very fuzzlike in many ways. I get the same thing by putting my Big Muff on top most drive channels so... not worth it. Nice pedal if you dig this kind of tones, but if you have a muff, it may not be worth it.
MXR Boost/OD: Average pedal at best. It sounded good but didn't excite me. I spent way less time with it than with the others.
Zvex box of rocks: WOW. Absolutely BEAUTIFUL sound. 120 pounds so it was a little too much compared to what I wanted to spend. I could have afforded it but not justified it... But wow do I want one now. It really is a NICE sound.
MI Audio Blues Pro: THE WINNER! Beautiful tone, plug and play, 'fuzz' switch for a cool variation, and only 70 pounds. The cost of a Boss Blues Driver
Really no contest actually. That's a NICE pedal right there, especially for the cost. Different alltogether from the BOR. Which is partly why I bought it. I'll sell the SD1, DS1 and Bad Monkey and get the BOR, with the Blues Pro in front 
MXR Boost/OD: Average pedal at best. It sounded good but didn't excite me. I spent way less time with it than with the others.
Zvex box of rocks: WOW. Absolutely BEAUTIFUL sound. 120 pounds so it was a little too much compared to what I wanted to spend. I could have afforded it but not justified it... But wow do I want one now. It really is a NICE sound.
MI Audio Blues Pro: THE WINNER! Beautiful tone, plug and play, 'fuzz' switch for a cool variation, and only 70 pounds. The cost of a Boss Blues Driver