Levinson vs. McIntosh vs. Lexicon or ?

I do not consider Lexicon amp to be in the same league as a ML amp (I do agree with the Harmon support and service mentioned above). I am not crazy about McIntosh with Wilson, but otherwise I generally like Mc. I do like Wilson speakers (that is what I run). Of the three amps listed by OP, I would go with a Levinson .5 series or better.

6550 I hear what you are saying, but I am not convinced of your conclussions. I spoke with some people (@ Harmon) in Indiana about a month ago. There were quite a few people there from both Levinson and Proceed, so I cannot agree that they have fired everybody.

I also don't necessarily agree that the pro audio market side shouldn't be doing any of the work on the ML equipment.

At the same time, I can completely see how you could have these concerns (I just haven't seen them yet!). I hope you are not right, but you very well could be in the long run.