First, awesome collection. Second, MAN YOU HAVE A LARGE SPACE TO WORK WITH! And yes I'm yelling for emphasis. Wow. Those "bad boy" 10's pop up here from time to time and seems many (most?) people love them. Look nice too.
I'm only going to comment on the Mach One, since I'm most intimate with them. Generally speaking, they're the least expensive to be had and with the VL mods really wake up. They won't, of course, compare to the D10's, but they are a far cry better than stock. Cost to upgrade is inexpensive and most people have loved the transformation.
When I talk about "general", not everyone finds that magic bargain, so I'll say "average street price" the Mach One tend to be the most plentiful and least expensive. Though I have to say, prices have been going up on ebay. I picked up a pair for $30 or $40 bucks. Had another pair given to me, and won't say what I paid for my first (2) pair.
I know that of all my speakers, the Mach One and Mach Two handled the most abuse, particularly with Action Movies (sans subwoofer). None of my speakers could handle the demands of bass like the Mach's, no bottoming out or over extension of the woofer.
Please do keep in mind I'm not saying these are upper class music listening speakers. There are better out there, but these really fill quite a bill for little dollars invested.
As for Infinities, I would love to get my hands on a pair of QLS1. Oh well.
Great write up!