Fusobal, take a look at my review on the XA-60.5's for details regarding why they replaced my XA-100's in my system. I had a 350.5, great amp, but sonicly the new XA.5 series is sonicly a major step above the X.5 series.
Tvad, I drive my MG-20's with the XA-60's with no problems, actually for three years I used the XA-100's, so I believe that the amount of current/watts of the XA-60.5's could handle Fusobal's Be-10's.
Fusobal, why don't you give a call to Mark at Reno Hi-Fi, great guy totally honest and knowledgable about matching which Pass Labs amp would be in your budget and drive your speakers with the greatest synergy.