Dan D’Agostino and ARC Ref. 10

leog2015
  Do you people think it will be a REAL step-up over my Rogue’s or shall I stay with tubes?

With the Ago having 100kohm input impedance, it's a perfect match for a passive. You could try this $49 one and send it back if you don't like it.
http://www.schiit.com/products/sys

Or the more fancy Shiit Freya, which gives you the choice of passive, tube or solid state outputs, and it remote as well as balanced or SE also returnable.
http://www.schiit.com/products/freya

Cheers George  

Audiotroy:
First, I have Sasha 1s with a titanium tweeter which is more incisive but not as refined as the new silk dome in the Sasha 2. The ARC/Dag combo was not too hot for the tweeter. Second, I never said that the Sashas were "like" the Evolutions as they are not. I did say that I thought it would be a great combo.
Leog2015:
I have a friend with your Evolutions with an all ss setup and I have heard them at length. I also have a friend with Aurum Cantus speakers with their ribbon tweeter. He happens to have a VAC front end and a somewhat warm but very natural sounding ss amp (Wells) which has a presentation quite similar to the Dags. The ribbon tweeter sounds sublime there. I believe you will hear an inviting, much more dynamic, bolder and more transparent sounding presentation if you take the ARC/Dag route. It goes without saying that you will lose some tube warmth absent the Rogues but a scrim over the sound will also be lifted. Of course, Audiotroy states the obvious--your turntable, digital front, cabling, room, etc will also play a role in the sound.

What about the Mcintosh MC-2301s for my system?

ARC Ref 40 and VTL MB450III is a great combo for me. Use the balanced connection and then tune to your speakers with the adjustable damping factor. The VTLs also benefit greatly from Herbies dampers and the type of stand and footers you use

Great combination.

http://www.audioshark.org/dagostino-audio-47/trying-out-dagostino-s250-13037.html