Boos is "the" name in what they do for a reason - they are the best; to assert otherwise is patently ridiculous, and demonstrably so...
Ridiculous? lol
Boos may be one of the better
mass-produced commercially available products along with Michigan Maple/Bally:
http://www.mapleblock.com/detail/michigan-maple-block-history-53/But Best? *
Quality wise, something coming out of a small woodworker's shop that uses larger end grain pieces, properly cured wood, assembly technique, and far better attention to detail and quality control... I examined Boos and a few others, in hand, and went with a BoardSmith. It was an easy choice...
*
For further reading- Google Boos and board failure, cracking, splitting, etc. 
