Used Bookshelf up to $3k

If you want something that is less analytical than the Merlins, perhaps a pair of Wharfedale Super Lintons?

Reference 3A de Capos

These worth a look

https://www.usaudiomart.com/details/650251129-dynaudio-special-forty-bookshelf-speakers-grey-birch-with-dynaudio-stand-6-stands/

I'd just like to see how what something different sounds like.

High-end speaker preferences are highly subjective, best to listen for yourself at high-end audio stores and shows.  

I do not believe the audio store sound will sound the same as my home. Also, while there are a few stores about an hour way, they have very little to offer in used speakers in my price range.