MIT is one of the more difficult lineups to sort out. I have the Matrix HD 60 speaker cables and these were a big upgrade from a decade older pair of Oracle "dot" series cables. It's my general sense that the MA-X and Matrix series were both well regarded. I believe that the 350 EVO shotgun was really good back in the day, but I suspect that you will find the MA-X to be a significant upgrade. Likewise for the upper end of the Matrix series.
I think the new ridiculous prices are MIT's version of the Transparent Cables pricing model. iirc a former Transparent dealer said that his cost was somewhere around 20% of retail price foe most of the line.
Plus, if you don't like all the sound manipulation via the various knobs (I hate it - all knobs are off in my use) then there has been very little improvement in the most recent generation versus the original MA series cables (just a touch more speed but you have to use the top of the line current interconnects to hear even that).