Recommendations and thoughts for end game speakers and amps


Good morning all. I am looking at Rockport Avior ii speakers. My dealer likes Boulder amps with these but I wanted to get everyone’s opinion first. I will be getting an integrated with HT bypass. Right now I’m looking at the Boulder 866, Gryphon Diablo 300, and the Simaudio 700iv2. Has anyone listened to these speakers with these amps? I’m looking for highly detailed but not harsh highs and mids and outstanding bass as well. Basically a set up that performs fantastic from top to bottom. If you have any other speaker or amp suggestions please let me know. Thank you! 
ronboco
Www.sanderssoundsystems.com

   The Magtech has been on my radar for a long time. She was sent to me, sat on my house for a week, did not open, shipped back to Roger from financial issues we had at the time.    Wish she was still here, 

   His setup is simply outstanding, the incorporated woofer with the panel speaker is flawlessly matched for music, unlike some of the other brands.

 Anyway, if you’ve decided to go another route, great!

or try the Sanders sound in home for 30 days!
@verdantaudio 

Thanks for the input and suggestions. When I listened to the rockports they were being driven by Boulders big stereo amp (2160?). All class A. In the short amount of time I spent listening I found myself wanting a little more energy in the highs. Will the 866A/B give me that ? Also I’d rather not spend 15 k on cables if there is a high quality alternative. Along with the other suggestions offered do you have any suggestions for cabling? Thanks! 
I don't think that you will get a lot more energy in the highs from the amplification.  Not sure how that DAC is.  Are you looking for an all-in-one exclusively?  Do you need internal DAC and streamer?   How big is your room.  I am thinking the Ayre AX-5 Twenty would be ideal in terms of sound profile but doesn't have the same feature set.  

Regarding cables, for value, I like Audioquest ICs (particularly water), Audioquest Robin Hood and William Tell for speaker cables and Puritan for Power though I am about to order and get demo's of Clarus.  I hear VERY good things about Clarus.  

InAkustik is my current favorite for mid-priced cables.  A pair of excellent copper speaker cables can be had for saner pricing  ($5k-$7K) and I am not sure you need silver.