Unfortunately OG, you're out of the loop! The Alpha 15 is super popular at the moment for use as an open baffle woofer. Why? High Qts. That low end peak that the high Q woofers have helps give the Alpha 15 some actual bass on open baffle. Little or no EQ needed.
Martin J King is the champion of this approach. See this PDF. http://www.quarter-wave.com/OBs/OB_Design.pdf

That's not to say, however, that it's the best sounding woofer.

But the approach and the driver have their fans - and detractors. A lot of folks don't like the high Q woofer sound, no matter what.

The the OP asked his question over on A.C., I pointed him to the 605+18" rig I'll be showing in Dallas. But I don't think he has been back to the thread since he posted.