MTX isn't bad. I ran Thunder 4500 DVCs with a bandpass lab box in high school- those things HIT. They were also substantially cheaper than other offerings, at around $45 a driver new on the bay.
Nowadays MTX is pivoting to try and compete with JL/Alpine/Phoenix Gold head on, which means an upgrade to quality and costs
I would personally buy a beautiful fiberglass 10" enclosure from @
Integrity Concepts and source a used quality driver, like a JL W6v3 or Phoenix Gold comp series
http://www.integrityconcepts.net/project.html
but the MTX isn't bad. 400w RMS with decent response (I hate how they keep pushing "peak" numbers. Come on guys, in this day and age, that's almost insulting)