Would This Amp Be Worth The Cost?

Test still needs to be blind whether it takes minutes or weeks. Whether one agrees with bluemoon or not you have 0 evidence to support your statement just like everyone else making this claim

That's the beauty of it. I don't have to prove or disprove anything. I use my ears. And if it sounds better to me, it IS better.

You objective guys overthink this every time. It's not clinical science. It's AUDIO. You are supposed to E-N-J-O-Y this hobby. But you can't because of the stick up your butt. Relax and let the music wash over you, you'll be surprised at what you might hear.

Oz

@ozzy62

you took the bait...

...be happy, enjoy the music, and ignore the tr---...

Yeah I know better than to engage. But sometimes............

Geez, my wife (and she isn’t “into it”) can hear the differences between amps... trust me, I’ve had a few now. 
To the OP, I agree with what you were told by the sales guy. Current can make a significant difference, possibly very profound. A class D amp is going to sound very different from a class A amp, even A/B, different circuits. Just is what it is. Then you get into SET, FET, MOSFET, bipolar circuits within all of that. They all have sonic signatures. I also agree that a tube preamp into an SS amp can make huge differences. “Better” is in the ears of the beholder... I just put a Rogue Audio RP5 into my system with a Pass Labs XA25, so far the combo is great. The Rogue replace an XP12 SS pre. The tubes just sound a bit smoother, more “natural” to my ears. No listening fatigue at all. Anyway, this game is about experimenting and finding the best combo you can afford... it’s a lot of fun. Sometimes.

Thanks to all.
For now I'm going to wait.