Best tube amp with B&W 805D?

Looking for some insight and recommendations on tube amp to match with the B&W 805D. Will likely keep my ARC LS17 as preamp for now. I am looking into McIntosh MC275 or Primaluna Dialogue Seven monoblocks. Though would prefer to stay under $4k if possible. Currently running a Bryston 4B SST2, and it is an awesome amp with my previous Maggie 1.7's but is a little too forward and seems to be overkill with the 88db 805d's. My desire is to add depth to the soundstage and move the imaging back just a bit. Any experience or insight would will be much appreciated.