I recommend Nola Contender 3 floorstanding speakers or the upgraded S3. I have the Nola Boxers, which are the smaller 2-way bookshelf, and think they're voiced really well and sound wonderful. The Contender is 90db sensitivity at 8ohms impedance. Should be easy to drive with your MC275. Good luck in your search.
I responded earlier giving a recommendation for the Tekton Lore speakers. My prior systems consisted mostly of tube gear. I just picked up a Rega Brio integrated amp and honestly I’m blown away at the performance of this piece for the money. Paid $300 used and it’s the latest version. At 50wpc way more than enough power for the Lores. I am biased towards tube gear but I’m amazed how musical some of the modern, modest priced solid state gear sounds these days.
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