Power Amplifier - Maximum Resolution & Detail!

I am assuming some of you have experienced the following.... All else being the same in the chain, you replaced a power amplifier and started hearing more resolution and detail, perhaps a lil more in a track that you have heard a thousand times.

Ime, the higher you go up in price doesn't necessarily guarantee that you could experience the above mentioned. It seems to come down to the nitty gritty of the circuits under consideration, i.e., the black art of power delivery and analog circuit design.

What is a power amp you may have experimented with that provided the maximum detail and resolution at any price? (Not just perceived changes in tonal balance, etc).

I am hoping to shortlist a power amp based on some suggestions here for a future purchase.

P.S. If you are an ASR type of guy who thinks all power amps sound the same, this may not the right thread for you, I suppose...