Martin,
I think you underestimate B200's performance. That element can be made to sound very good.
However I side with you in the case of the Alfas. Here in Europe I can by the Alfa for less than 1/3rd of what an Augie would cost me.
You also have to consider the baffles. With 40" path difference for the front and backwave one Alfa would give exactly 100 dB max at 40 Hz in half-space according to Linkwitz' Excel-calculator.

Martin, It just struck me that I do not need to educate you on simulations.
/Erling