Personal opinion, I think Sean (aka "the Ninja") needs to simplify his marketing message a bit. That many different versions of upgrades for the same speaker just seems over the top and more confusing for would-be buyers, especially considering that most people are very happy with their M22s to start with.
It's hard enough for me to imagine that there is a way to markedly improve the sound the designers intended, but even if reviews like the ones above convinced me that it was in fact possible, I start to really scratch my head when I consider that the crossover designers propose x different ways to improve on the M22.
My unsolicited advice, decide on the best combination of price and performance for the stock speaker "upgrade" and put it up for sale. Once you've convinced someone to upgrade, don't make the final process even more confusing by forcing them to choose among a handful of options...
Jason
