I own Moabs, have heard Pendragon XL, and active in the FB Tekton Owner's Group. I would say first of all no worries about the sound, that is a given. The best indicator is they sell a ton but yet hardly any ever come up used. Instead focus on what you really want it for, where it will be used, practical considerations like that. Impact Monitors would be great, but you may want a floor stander. That kind of thing.
I would lean Perfect SET 15 due largely to that being a bit warmer balance than the others which will probably be an advantage with your receiver. But it is a close call. Honestly there are no bad choices here, they are all very easy to drive and will go great with what you have.
Also these are so good, relative to what you have, that you could either be super happy and done, or else they could serve as a foundation for building a much better system. They are that good.
The reason I say this is most of us here are so obsessed with hair-splitting details we forget there are people who just want to get something good and enjoy it. That you will do with any of these, and with ease.
Another thing to consider, availability. That could range from ship next week to ship next year.