Recommendation for a highly resolving amp

What you are saying is true. However, what I learned from his system is what it sounds like when there is higher resolution. I am not necessarily trying to recreate his sound; just better sound for my system.

Getting back to the original question about a highly resolving amplifier my current Pass Labs XA25 is very resolving and transparent, some say the most transparent and resolving they have ever heard. 
It is much more so than the Parasound a21+ it replaced but not a night and day difference.  
The ultimate transparency and resolution you hear is a function of every component in the chain, the amplifier being one part.  

Still haven't determined what you mean by 'resolution'; it does seem that those in this discussion are talking about different things.

My friend is a Spectral man, so he recommends a complete Spectral system. Along with all the MIT cables.

Of course he would. But its not the best amp to use on Sound Labs IMO and IME. The best Sound Lab installations I've seen have used Purist Audio Design cables FWIW.