Hadn't known that point about the Synthrotek P/S flammability issue. Filed for reference. I've also been looking very recently at Koma's Strom and Strom+ setups, too...the ability to daisychain either above OR below the control surface has some appeal, and their busboard cabling assemblies are beefy things plus the tri-color LED rail load indication is extremely handy. More expensive, but I think they might prove to be a 'worth the expense' option.
As for the Dynamix, though...I'm a bit of a purist when it comes to getting that Buchla 'plook' from the LPG, and without the Vactrols, it's just not apt to have that behavior. If staying in the MakeNoise environment was a must, the Optomix makes more sense from an audio standpoint, but I think either are a bit spendy for just two LPGs + a few extra functions. Beyond that, though, the rest of that behavior is likely better done with a few small separate modules: DC-coupled linear VCAs for CV modulation, some added dynamics modules (especially with that opto audio envelope tail!) and distortion post or pre-LPG as needed, etc. Especially if that point about a 4U case with a tile row comes into play, as VCA and Vactrol tiles are quite cheap things, plus an overdrivable signal amp for nastiness in that format is easy, too.