Low power tube amp for Sonus Faber?

My options are 845 compact or mc275. 845 evolution is not an option for me. 

I think MS is more high end than mc 275 (is this accurate ?) and I’m trying to stay away from Mcintosh. I’m currently using mc452 and c2600. 

@mboldda1 

how is your low end bass performance? 

@georgehifi 

I’m  not sure how to interpret those numbers. Also have an option to get an older Krell ksa300s, not sure if it’s superior to my Mc452. What do you think ? My plan is to have one SS and one tube for Elipsa. 

@ei001h  Also consider Lyric Audio.

Here is their Ti140 Mk2 integrated...

https://www.thecableco.com/used-components/used-amp/ti140-mk-ii-integrated-amplifier-silver.html

You will have ample power with 70 watts per side when using the KT150s. It allows for negative feedback adjustment and wide tube type (and variant) options.

I found it's performance to be superlative in conjunction with a power conditioner.

A lot will depend on your room size and listening habits.
The speaker efficiency is about 88 or 89 db 1 watt/1 meter; on paper the speaker is rated with the sensitivity spec of 91 db. But because its nominally 4 ohms, this means that the voltage into the speaker will be more than one volt; hence the lower efficiency.
With tubes, the efficiency spec is a lot more useful!!

30 watts won't be a lot of power on this speaker. I would consider something with more power. The low impedance dip in the mid bass is not challenging to most tube amps (including OTLs) so I don't think you have any worries there. I would shoot for an amplifier with 100 watts or so- you could get by with a 60 watt amp, but if you play tunes like I do, you'll be running the amp out of gas.

I have a small room and listen mostly to piano, jazz, opera, classical, full scale symphony etc. 

If I crank up the volume, am I risking amp to clip and damage my elipsa? 

i really wanna get the amp, I’m in love with it. 

I bet that amp will never get out of 2nd gear in a small room even with the SF speakers, and it's doubtful you will ever use up the 30 watts unless you use your room for drunken dance festivals...30 single ended watts is a strong wallop of mojo. I initially used my 12WPC Dennis Had SEP amp with allegedly 91db speakers (they may have actually been closer to 89db based on Stereophile measurements) in a largish room, and the preamp (SS with lots of gain) had enough gain to drive the amp into clipping which I only did when wondering, "what does this amp sound like when clipping?" Music could be plenty loud well below the clipping point so I just enjoyed the crap out of the rig...switched to 99db speakers eventually (Klipsch Heresy III) which really are more appropriate for this amp, and use a lower output tube preamp. Now things can get way louder than I ever want it to with absolute clarity, well under the clipping zone.