I've been wanting to build a new cab, being as way pleased with my 2 2x10's and 1x15 that I built using eminence speakers. I'm going to start playing with alternate construction techniques that I've learned since I've built my cabs. And now the MAGNUM series of cabs is available. And the 18" seems like it could kick some serious a$$. But the 15's seem like possible players also. The only reason I'm looking at the 15/18's is that I'm very very happy w/ my delta 10'ed cabs. My kappa pro 15LF 1x15 is good, but more is more...and more. Mmmm. WEIGHT! Get the @#$#@ weight down! I had to haul all of my cabs last week to a jam session, and they are very portable...but still way to heavy. Lightweight, stiff materials are the key. I'll figure something out. It'll be a composite material that will be formed w/ 5 of the sides at once, and then a seperate front piece bolted on/sealed...etc. It's all good.