It's been a few years, but here goes...
1st gen Radials: the soundstage was a cloud floating above the speakers, decent sound, some wouldn't need a sub
High Def Towers: silly/complicated design, not impressed with the sound
Haven't heard any other current offerings, but in general Decware speakers were quite bass light (something I see in nearly all SET friendly speakers). I wanted to like Decware (value, made in the American heartland, lots of support), but their amps were too small for my chosen speakers (and I believe deep bass to be foundational to quality sound). Even at the first Decfest he hosted, he kept turning down the stereo Imperial subs?!?
If you're looking for high efficiency, American made, reasonably priced speakers I'd look into Pi Speakers and Hawthorne Audio. Both sell kits/drivers. Hawthorne are open baffle (tiny baffles, that legitimately reach 40 Hz). The higher end drivers provide much improved resolution. The smaller ones close the gap between small tweeter/huge woofer, but with loss of deeper bass. Pi also offers value and are reasonable easy to build.