I have a 275 driving B&W 804S. It would play, but I think it would not have enough power to drive those speakers to their best. Jim Thiel came from the idea that power was cheap and hence designed great speakers needing a lot of power.
Having said that, time ago I used to participate in the McIntosh forum at audiokharma and someone sweared by his 275 driving his Thiel 2.4.
Of course, the best would be to try it. The 275 are great ( for the money) as monoblocks. You could start with one and later add a second...
Have you looked at the virtual systems area here? Search systems with CS2.7 and see what kind of amps people use to drive them. That will give you some reference points.
Let us know what you decide/ do, and good luck!