With all due respect, the question here is, 'Should I buy MBL?', not which speaker does one like the best.
Personally, I prefer the MBL, but can fully understand, given the variability of sound at shows, that one might, 'not have connected with their sound.'
Call...you remember phone calls right? That's what we had before the internet, and web sites...you know, 'Hi, My name is Bob...I'm thinking about purchasing your speakers, but wondering about service in the United States.'
Really simple.
I have spoken to the folks at MBL, they're unfailingly helpful.
I don't think I'd have any compunction about purchasing, but then I haven't researched them diligently--recently.
Do that, find out what THEY, not we have to say about warranty and subsequent service...that should give you your answer.
Good luck...them's mighty fine speakers, my favorites.
Larry