Harbeth P3ESR metal tweeter

They are easy to drive.They will play as loudly as you'd like with 50-60 watts.They won't have excess sibilance unless your speaker cables are a bad match.

My P3ESRs are really easy to listen to. I've never found them bright or harsh, but they do offer a lot of detail. I have mine in kind of a near field setup in my computer room. I'm many ways, they are my favorite speakers. They're also the least expensive speakers I own. They shouldn't need any "taming".

Thanks for the interest and replies.

The room is approximately 15' x 12'

Tellurium Q black cables (bananas)  swapped out occasionally with LAT International (spades). No clue on what criteria to look for to create synergy. 

Also I plan on using an existing B&W PV1D sub if needed.

One can only find the P3ESR to sound too smooth in the treble, in other words lacking in sparkle and excitement, or the sound is just right. It won’t sound bright even if you use the brightest sounding amp or cables on the P3ESR or any Harbeth for that matter.