i've got no dog in the hunt, but have auditioned and was very impressed with both (which, as above noted, really are different animals). the psbs to me were a great all-arounder with no discernible weaknesses--detailed, full range with seamless driver integration, i do not find that they "present a small image"; i think they have a significantly wider soundstage than the 3.7s, which have a more limited sweet spot. the 3.7s are obviously bigger, more challenging to place and drive and definitely need a sub (or two). however, they 3.7s present as transparent, lifelike and natural a sound as you'll hear, even more so than the very transparent psbs. the practical choice here would be the psbs, since they're less dominant aesthetically and you don't have to invest in the high-powered amps, subs, etc.; however, if you willing to make the commitment and wanted the best sound in a dedicated room, the 3.7s might be the choice.
