Used McIntosh Amp or better new options out there? - Amplifier or Integrated


A little about me, I am in the process of building my next step up 2-channel system for a listening room that is 17’x13’x12’. Current gear: LS50 and Paradigm Studio 20 v5 + Rotel RA-12 + SB2000 
For me new speakers I’m thinking in the $3-4k price range floor standing speakers. Some of the speakers I’m considering: Dynaudio Evoke 50, KEF R7, Focal Aria 936, Salk Song3 tower and my stretch budget option is the 805 D3s. 
I mostly listen to Jazz, orchestra/instrumental, Pop, some trance/electronic and Classic rock. I’m a fan of a clean but less harsh highs, non shouty mids and tight controlled bass. 

Now back to the topic at hand. I came across a used MC152 at a local high end audio store. The sales guy indicated this was originally a demo amp from their store that one of their regulars bought and recently traded it in for a large Mac amp. He indicated its from 2017, but no way for me to know for sure (not sure if the serial number will let me look it up?). I auditioned this amp on speakers they had in store and I really liked the sound it produced on my usual music tracks. However the left VU meter needle on this amp was not working. Apart from that looked in mint condition, not scratches, no marks on the screws that would indicate tampering. The dealer said he’ll get it serviced from a local third party McIntosh repair shop and can then sell it to me once fixed and I’m satisfied with its condition. They are asking $2.8k for this amp, which is what attracted me to it given how expensive they are normally. 

Now my question is, should I bother taking the plunge? Now that I found out the VU meter is broken, I’m a little turned off since someone is now going to open this thing up (probably for the first time). I’ve heard Macs are bullet proof and last for ever, but does anyone see any red flags here or anything I should look for?

Given the $3k ish price range, is there something else I could consider in this range (I prefer Class AB or Tube or Tube Hybrid). Is paying close to retail for a new MC152 from a dealer worth the extra money (warranty and less anxiety)?  This is the first time I’m buying in this price range, so I want to make sure. I’m open to both a good stereo power amp or an integrated as long as its a sizeable upgrade from my RA-12. If its only an amp, I intend to us the RA-12 as a preamp for now till I can budget for a good tube preamp (Rogue Audio perhaps) 

I ideally wanted to stay at about $6k for speaker + amp and was leaning towards one of the Dynaudio towers + a parasound Halo or Rotel RA-1592 / 1582 MkII type amp. I always dreamed of owning a McIntosh or Luxman but couldn’t stomach to full retail price on those beauties. Any help to reduce my anxiety or providing some suggestions would be much appreciated :) 

Thank you! 
sr20022002
@stereo5 As you can probably discern, I am not looking to be combative, far too many of those types trolling the waters. At the end of the day, most of us agree that our little esoteric hobby is purely subjective to the individual. If what you are listening to elicits a smile, toe tap, or a windmill style air guitar, you have found your own audio nirvana and no one should suggest otherwise. Continue to enjoy your retirement and the fruits of your sonic minded labor! Cheers!

@gdnrbob For some reason I’m unable to see messages from my profile. Not sure whats going on. But either I just posted an update above. I’m pretty excited for this first piece of serious gear I acquired :) ... thanks for all the help! 
@ laaudionut

I can totally see that somebody may not like the "Mac sound", and I am sure there could always be a better "bang for your buck" somewhere else. But please do not put up an unsubstantiated claim (e.g. 95% of the people, etc., etc.) when you have no stats to back up your claims with. It is all personal, and I am glad you found the sound you really like. Just don’t preach as if it is the gospel. For one, it makes you sound like a hater and doesn’t really strengthen your message. Just my two cents.
@sr20022002,

You can call the McIntosh factory and they can give you the date of manufacture.  I owned that amp for 2 years and it was a powerhouse.  Don't be surprised that the amp looks brand new, most McIntosh guys keep their units in pristine condition because the resale value is much higher.  That mdf is there for a reason, it keeps the amp from shifting in the box and keeps the glass safe.  I would not plug that amp into a Panamax, it will degrade the sound.  Either plug directly into the wall or get a passive noise conditioner just for the amp.  That way, you won't limit the power of the amp.