mastersound SET amps from Italy

Believe it or not I'm driving my 81dB efficient MBL 101Es with their 20 wpc 300B integrated.
I will be ordering a pair of their monoblocks but I won't know which ones until I hear one of their 845-based products.
Though 20 watts are not enough for my speakers, these are the finest amps I have ever had in my house.
I should note that these 300B amps produce a very clean and powerful sound, they are not warm and fuzzy.

Has anybody compared any of Mastersound's 300b-based offerings with one of their 845-based offerings?

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.

Dazzdax,
Right now, in the US, they are as follows:

300 B Monoblock: $11,695
845 Monoblock: $14,995
PF 100 Monoblock: $39,995
(These are the limited edition amps using four 845s to produce 117 wpc)

I haven't heard any of their 845-based offerings so I can't comment on the sound.

If you live in Canada, like me, the prices would be slightly different. For all I know, these prices may change after this week's CES.

I owned the Viva 845 monoblocks a couple of years ago.

"Not all Watts are created equal."
I couldn't agree more with that statement!

I had a chance to the hear the Mastersound Compact 845 amp in my system compared with the 300 PSE.
If I went through a checklist of twenty audiophile-approved criteria most checks would probably end up with the 845. I would then unplug the 845, put in its box, and enjoy the 300B.
One sounds like real people playing real instruments in my room and the other sounds like an incredibly good stereo.