Dazzdax,
First up, I'm not buying the 20 wpc amp, I am going to buy either their 40 wpc or 117 wpc monoblocks. I just have the little integrated amp on loan.
This amp sounds nothing like typical solid state and very little like premium SS.
In my current system I have been through the following amps (in reverse order of preference):
Manley Neo-Classic 250 monoblocks (250wpc)
Atma-Sphere MA-2 mkIII monoblocks (220wpc)
Hovland Stratos monoblocks (640wpc)
The Hovlands, by the way, are the only SS amps I've ever liked.
If you've seen any of my 'odd' postings about the sound I'm looking for then you'll know that I am fanatical about spatial presentation.
I haven't thought in terms of "neutral, fast and dynamic sound with good bass," for years. I just think, 'am I in the presence of real people playing real instruments in my room?' Or, better still, 'am I in the presence of real people playing real instruments in their room?'
The Mastersound 300B has the most natural, room-filling sound that I have ever heard. It's a simple as that. Everything else that I gain once I get a proper linestage and phonstage hooked up to their monoblocks will simply be gravy.