Audio Research VT80SE amp vs Prima Luna EVO 400 or 300

Flame — hard to say.  Different rooms and very different speakers.  Some time ago when I replaced the 75SE with the 160S, in the same room and system, paired with DAWs, the 160S brought dynamics and “jump factor" to a whole new level.  It is dynamic as hell.  Spanish Moon from Waiting for Columbus became a thrilling ride; air drumming is an involuntary (if mildly embarrassing) response.  The 160S also brought a different sense of clarity/definition.  I hesitate to say better, but different.  More forward.  If you get off on the arresting transparency of a perfect Julie London or Nat Cole recording, or you want to feel the breathiness of Ben Webster, I’ve heard nothing better.  But I think in 10-20 years some will still love the 75SE for its ability to remain unnoticed, its naturalness, and its relaxed presentation.  In real life, when someone is playing a piano or guitar in your room, they are not trying to impress you with sonic charms.  Such is the sound of the 75SE.  In fact, it is VERY good in this regard.  But a true confession: I waffle between my teenage brain seeking punch and sizzle, to a more adult appetite for effortlessness and flow.  For example, at least once a month I seriously consider auditioning a D’Agostino stereo amp in place of the 75SE.  The 160S also offers more punch, with a noticeable "charm" in that lovely lower midrange, upper bass region.  And good ole’ bass is definitely tighter and more pronounced.  Final word on all this: the ARC break-in period is notoriously long, and it’s not malarkey.  Make sure you’re listening to a fully broken-in ARC amp, otherwise all bets are off.  

@jrw1971"I waffle between my teenage brain seeking punch and sizzle, to a more adult appetite for effortlessness and flow."i can relate, even tho' I'm well into my "golden years."  My wallet is a bit too thin for the upper echelon ARC gear but happy for you!

@sandthemall
Very helpful, sir. Thanks

Interesting thread. I am thinking that since the OP owns the same speakers as I do, that the answer to his question is going to be highly dependent on the rest of his gear-- and his room.
While IMO the GH’s can sound warm...they are actually not really a ’warm’ speaker. The GH’s, at least IMHO, are so revealing that if you place ’warm’ sounding gear upstream, along with cabling that enhances that...yes, you will get a very warm presentation. OTOH, if you place more revealing and ’neutral’ gear upstream, and cable for that, then you will get a ’neutral’ sound out of the GH’s. The synergy with the GH’s..and the room/gear, is the decider here. Personally, the amp question is a no-brainer to me...and the answer is the ARC.

Thanks jrw,

My experience has been exactly as yours. 
I had intended to go ref 160s from my ref 75, but found the sound different - as you say. Better in some ways, but at the same time another step in the direction I experienced going from Ref110 to Ref75 (I still miss the low level late night listening on the ref110 - tubey magic).

Anyway, my thought, that you have helped validate, is perhaps PS should consider a lightly used ref75 for similar money to the VT80? I think if you do you won’t be disappointed and you will always be able to move it on and get good money back.

I regret selling mine, they are very special.

ARC better sound better made in USA.