Just to throw in my $0.02, I agree with Brian and BB58. I have only tried the BMBH for about 5 minutes so my experience there is very limited, but I had a Chrysalis for about a year and like the shallower bathtub better (the chrysalis has wider spreaders). Going forward, I have been very satisfied with my DIY bridges with narrower fabric and wider spreaders as I don't feel my shoulders to be so constrained. Another mitigating factor not yet mentioned is that if you use a pad inside the bridge or between layers, it effectively lifts you up slightly from the bottom of the bathtub and gives your shoulders a little more room. I use a pad in my DIYs, and when combined with the flatter bathtub, don't get any "squeeze". For reference sake I am ~190#, 6'1" and wear a 42 or 44 sized suit coat.
All of this is to say, if you are quite broad across the shoulders you might also look at the Chrysalis in addition to the JRB BMBH.