I am not "hear" to diminish the merits of any of these products. My intentions are purely based on my own, as well as, my "family" of friend's trials and tribulations. Yes, to your question, I have had direct experience with everyone of the products discussed here, as well as, many more.
I never said I had a "shoot out" comparing them all directly. My observations are purely born from listening in either familiar situations and or with gear I am a custom to. As far as set up and the like, it is only a pain when you are not committed and or you don't care.
Life is mundane enough so, when an opportunity to try/hear GPA or any of these products in a number of different systems, I find it instructive if not fun. As you state, "others" may have differing opinions (which is of course, great), but for myself and my extended family, SRA just digs a little deeper, seems more serious and for good or bad depending on your living situation, aesthetically more décor friendly (re: décor friendly: I believe I read in an AG thread you making the same comment when it comes to looks). While we are new to posting, as you were so kind to point out via your welcome, we have been reading AG threads for years. A friend pointed out this thread as he WAS on the fence with an equipment rack purchase. I thought I would join the fun in 2006 (a little early yes) & post once, maybe twice per thread if I thought it was interesting. Once again, I think one's decisions need be there own. These are all wonderful products but, back to the original question of best, for me as well as, many friends, SRA seems to do the job of isolation better with less negatives and just looks totally cool in the process.