Hey Dante, while I get your trepidation given the age of the ADAs, I've never had a problem with first my MP-1 rig and subsequently (many years now) my MP-2 rig. I worked out all the recent issues in my 8RU live rack were other things (gummy faders in the mixer etc) nothing wrong with my MP-2. As you know I have bought a few more MP-2s along the way just in case, and also to have one in my studio rig. The new 4RU rack I put together (MP-2, Midiverb 4 in the MP-2 loop (never did this before) and B200s) is going well and so much easier to transport. With all the chat about MP-2s getting hot etc I've started to think about fans. That said I've never had an overheating issue and hey I'm in Australia, we are even closer to the sun that you are LoL.
All your (and others) experimenting with other rigs makes me think about other options, but there's still nothing around that floats my boat to substitute for my MP-2s, they are intrinsic to my sound, I've always developed my own tones, not tried to emulate others.
So it's good you are going to give it a go
, hey take a spare, it's good practice anyway but your ADAs shouldn't let you down. They are well built and made for touring. Mine have survived lots of bumpy dirt tracks etc and are still going strong. Moreover, they just sound so good