OK, so for the moment, I will be going with the ScubaPro X-Tek Donut Wing and practice using that equipment for the time being. I don't intend to take the GUE course before the end of next summer or the beginning of fall 2019 anyway.
If I eventually "grow out of it", I will probably be able to resell it to someunsuspecting victimdiver who has less specific needs then myself.
Nothing wrong with the Scubapro X-Tek Pure Tec harness. I would avoid the Form Harness...if you are set on an adjustable harness, the Apeks WTX Harness is a much better solution. Why ScubaPro chooses to put their proprietary inflator on what they market as a technical wing is beyond me. They also include a low pressure inflator hose that is way too long and have a huge knob on the dump valve, but I believe that knob is a CE requirement.