Honest opinions on my two picks of loudspeakers

Thanks @elizabeth..same response really that I gave mijostyn I always thought they were top of the line? I also always knew they're stuff was expensive but well worth the cost for what you got quality wise no? Wilson's are also up there in price as well which I may revert back to from what I'm hearing about them..anyone have anything to add on the wilson Yvette or Sasha's?

You will need all of that power for the Revels.  Keep in mind that you can blow any speaker if you crank it loud enough.  1 watt of distortion can do it.

Shawn, It was the Grateful Dead's wall of sound designed by John Curl.
He did use Mac amps but not Mac speakers. It turned out to be too expensive and difficult to move from one venue to the next. But, it was knock out.
If you want clean SPLs get the new Klipsh Cornwalls version 3 I think. They will blow your doors off with 10 watts:)

I would say Revel, but agree with others that while they can get reasonably loud, they are not SPL speakers. What about getting some outdoor speakers and amp and have a zone for outside music when you are out there? There are some great outdoor speakers, or you could even use something like some the self powered JBL EON 612 ($900 a pair) which will push 125db and are made for sound reinforcement.

Just a note, I am your age and you should be concerned about your hearing. Extended high level listening not only results in hearing loss, but tinnitus. As someone who has lived with tinnitus since being a teenager (loud explosion) and has trouble picking out voices in a crowd, you will care when it happens. The worst part is for many people, they then become sensitive to loud noises. I cannot go to a club without hearing protection or it is painful.

I would suggest you do some reading on the reference levels used in mixing as set forth by Bob Katz. Essentially, for a large room, you will set your volume to a 82-84db reference level. While 82-84 db sounds low, it is plenty loud and the level used by most good studios and there most mixes sound proper. Any louder and you quickly suffer from temporary hearing shifts and keep turning up the volume without it really sounding any better. Here is a basic read on level setting.

https://www.soundonsound.com/techniques/establishing-project-studio-reference-monitoring-levels

McIntosh amps are voiced laid back and mild in the midrange and upper mids. I have heard them sound very good with good speakers, such as Sonus Fabre and the like.  However, McIntosh amps paired with McIntosh speakers sound very dull, boring and lifeless.  There is absolutely no excitement or anything on this pairing.  I would not recommend it to anyone unless you really want that type of sound.

The Revel speakers are excellent and would pair much better with the McIntosh amp.  However, like everyone has said, they are not efficient (somewhat low at 86 db).

Some people here are recommending JBL compression and PA type speakers.  While these are good for live sound events, they are still really not an audiophile speaker.  If you are going this way with looking for a very efficient speaker, the new Klipsch Cornwall IV appear to be excellent.  With an efficiency of 102db/watt, you can drive them to maximum volume with 100 watts at 122db.  They will do much better then the other two speakers you are looking at for loud rock/metal type of sound.

There are others, but with the high power of the MC452, you should probably look in the 90-94 db efficiency range.