Nice, informative thread. It all comes down, I think, to personal preference and finances.
The comparison of subframes (the most reputable ones , at least) is similar to comparing a BMW 5 Series to a Benz E-Class, if you will. Some will say the Benz handles and rides better, and some will say the BMW is more comfortable and has more power, or vice versa.
Bottom line is, both are great cars, comparable in price and amenities and they are more than capable of yielding very similar results, overall. Which would you spend your money on? Same as the subframes...personal preference...for the same basic design, they ALL pretty much do the same thing. All be it, some do things better than others, but they also lack where others excel.
This is coming from a guy that purchased a Martz Chassis sub-frame a loooong time ago, because of budget issues and the only real competition at that time was Wayne Due, and he was so swamped, he wasn't taking on any more orders.
My Martz Chassis works well. I can't compare it to any of the others, as I don't own any of the rest. But I can say that I have rode in a DSE sub-framed Camaro, Jim Meyer sub-framed Camaro, a TCI Camaro, and a modified-stock sub-framed 69 Nova. To me, the Jim Meyer sub-frame was the best ride out of all of them....even my Martz.
DSE seems to be the most popular, i'm guessing, because of the publicity and so forth. I like the complete system that they offer. And I see a lot more DSE equipped cars than the others, out here in Cali. Just an observation.
If I had to do it all over again, I would go with an Art Morrison set-up, due to the fact that it has a lot of stock GM parts that can be replaced locally, quick and inexpensively.
Just my .02