Tube amp mono block recomendations

Our M-60s work very nicely with the Audio Notes. IME it is helpful to give them a bit of power- while they are easy to drive and a benign impedance for tube amps, I would characterize their efficiency as 'moderate'; about 90 or so dB. So in most rooms 60 watts is a good minimum amount of power.

For this reason unless you are nearfield in a smaller environment I would not recommend a 7 watt amp on this speaker- it simply won't be enough power.

The Tannoys are very nice but here again its helpful to give them a bit of power. Of course this is true of the Snells as well. IMO/IME if you are planning a tube amp, 60 watts should be your minimum target power, but a lot depends your room and listening habits.

Have you thought about VTLs?  Rock solid and deliver extraordinary detail.  Nice amps for the money.  

You may also find a pair of MC75s from McIntosh in that price range.  

You should be able to find some used Rogue Audio M-180 monoblocks well under your budget (they are $6500 new).

I have them in my main system.  They are detailed and dynamic and fairly neutral.  I wouldn't classify them as "bright", they are in many ways closer to a good solid state amp (great bass control, neutral, quiet) than they are to some of the warmer, syrupy tube amps out there.

i have an audio mirror tubadour III dac, which is damn impressive. Vlad builds the audio mirror reflection monoblocks, which may be worth investigating.... 

Checkout Quicksilver Audio !
http://quicksilveraudio.com/amplifiers/