Why not horns?

I'm in the process of building a pair of fully active, altered JBL 4345. I'm subbing in 2206 12" midrange and 2390 horn assembly. Ian Kackenzie on the Lansing Heritage site gave me the recipe. I have a 16X30 room for them so I think they'll still be able to rip my head off! It will be my first experience with JBL. Hope I survive.

I have 3 Acoustat TNT200 and an Acoustat TNT120. All just rebuilt by Roy Esposito of Sounds Like New. As I've stated before, 'I don wanna buy a tube amp'. So I will be using a 4 way Marchand cross-over. I have all the drivers and a line on a reputable cab builder. I'm hoping to have them set up by late summer. Actually, I have a Dynaco ST-70 with an upgrade/mod kit that's been sitting around for a few years. It came with a cd installation manual but when I finally decided to tackle it this past weekend, I discovered my recently acquired MacBook Air doesn't have a cd port. What the heck?! So much for paying attention at the Apple Store.