Help choosing tube monobloc's


At present I am running a Sunfire Tube Preamp and Sunfire Signature power amp.
I would like to introduce monobloc tube amps into the system.
The speakers are Kef Model Four~Two so they like to have power (I was thinking 150 wpc min.).
I have been thinking about a used set of Sonic Frontier power three's.
My budget is in the $5000.00 to $7500.00 range.
I mostly listen to classic rock, with a minor amount of easy listening, folk and classical through a Sonic Frontier Phono 1 tube amp (can there be too many tubes in the signal path) and Oracle table
I would appreciate anyones advise on tube monobloc selections.
883dave
I can also vouch for the Rogue M150's. I have had a set in my system for a while.
I had traded down from a set of Mark Levinson 33H monoblocks, so it was quite a shock, at first. But as they got some hours on them I became quite fond of them.
I am playing them through a pair of Revel Studio speakers. I was not totally satisfied with the bottom end, so I have recently added a REL sub to boost the low end.
The amps seem to really like silver speaker cables.
Just my two cents.
Another Rogue M-150 fan here. Have had a pair hooked up to my hard-to-drive Martin-Logan Aerius i's. The sonic characteristic of the amps can be taylored to your taste by rolling the input tubes. They are high-quality amps and Rogue service is world class.
Consider a pair of conrad-johnson Premier Twelves. 140 Watts per chassis into 4, 8, or 16 Ohms from 2 pairs of 6550s per amp. Two pairs in A-goN now, at $3300 and $4500. These are from the same era as the Premier Eleven, and I sure loved my 2 Elevens (until I turned into a triode freak).
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May want to try older VAC amps --monoblocs 90 D. 100+ watts/channel EL 34--great sounding amps with Martin Logan Aerius. See system for rest of my "stuff" Eclectic tastes in music--and Kevin HAayes of VAC is a great guy.

Steve
And yet another Rogue Audio M150 fan.I own a pair and confirm the above remarks.My speakers are Aerial 10t.For the ultimate use a Zeus on the bass.I will as soon as I can afford the upgrade.One of my pre-amps is a Rogue Magnum 99.
Best
George