$3500 floor standing speakers used. What would be your choice ?

+1 on the Spatial Audio Lab X3s open baffle used. Great speaker that works well in many different set ups. Easy to drive. 

B&W Nautilus  803, bass is tight and the speaker is warm sounding. Not forward or brigjht sounding with no fatigue.

My preferences are several I currently own like my mains PMC, small garage system Totem, and den system Sonus Faber ,but have quite of bit more power driving them than the 60 watts per channel so that might be a problem.

I rotate a pair Monitor Audio also but they are a little bright imo, a small pair of NHT's that still sound good. Had Dynaudio but to me were finicky somewhat so got rid of them and the KEF's were a little bright.

Don't like horn speakers at all and sure don't like the looks of Tekton but have never heard them.

If I was looking again the Devore's would be on a my list, ATC, different Totem's, always been a fan of English Speakers for some reason. Good luck

I would either go for Totem or Sonus Faber. Both are excellent and run for a great discount prices on the used market. Currently I run a Sonus Faber Grand Piano Home and next upgrade will be Sonus Faber for sure. If your music lean to Jazz, Classical and Accoustics they're hard to beat warm and musical never ever I thought it was fatiguing and I play them for hours every day. With your amp I think they'll be a match in heaven. Totem are great for their bass and small foot print and their imaging is wow! something I noticed they didn't do it for me for movies but other than that they're great for all genres playing better for Rock I guess.