The BT-12's are the best. The K&M 19674 will also work, but the center of gravity will be a little forward and they are slightly underrated at 55# for the SM80's weight of 65#.
I use those K&m tilters with my ev zxa5's (50lbs) cranked up high on my st-132 crank stands. although they do throw off the centre of gravity, with my Tripod legs spread wide, I have yet to find any issue with stability. (YMMV- not recommending using a product outside it's factory rated specs by using those specific tilters with the 65lb sm80). The locking sleeve works beautifully for keeping them from spinning around on you. Helpful if you're tilting "back" to cover a balcony for example.
Consider that the stand weighs as much as the speaker in this case, and that I'm only tilting maybe 10 degrees at most, it's not as bad as one might think. In a pinch I've even attached a pair of adj dotz Par LED wash lights using one of those short tee attachments from on-stage stands, and they were still more stable at 13' than some cheaper tripods at 6'.