Amp recommendations for KEF R7 speakers

Sounds like you need a preamp too unless I’m missing something. Not a Mac fan here — I heard the Blade 2 with some top Mac electronics and it was rolled off in the highs, which is not characteristic of Blades at all. You might consider a good integrated from the likes of Vitus or Gryphon that are higher level IMHO and will help flesh out the bottom end while never sounding overly bright with your KEFs. Here are a couple good examples…

https://tmraudio.com/components/integrated-amplifiers/vitus-audio-ri-100-stereo-integrated-amplifier-ri100-mm-phono/

https://www.audiogon.com/listings/lisa55a5-gryphon-diablo-300-with-dac-option-solid-state

Best of luck.

What sound characteristics are you looking for, what’s the rest of the equipment in your system, what’s your budget, and are you looking for new or used?  Are you looking for an integrated amp or separates?  The more info you provide the better and more targeted the recommendations here will be.