Wharfedale Linton Heritage vs...

I demoed the Lintons and really wanted to like them but I found them hard to listen to. The sound was just a total mess. Shouty, unfocused and incoherent. Something may have been amiss. The amp used was a basic a/v amp so maybe that was it who knows. Maybe some special processing was in effect. But I was very disappointed. Worst sound I had heard in a Hifi demo in quite awhile. I would not even call it hifi. More like bad mid-fi.  Would have to give it another try to see what happens. 

find a set of used proacs or harbeths or spendors

A lot of positive reviews on the Lintons, maybe you should try them out at home?We have all had demos on equipment that didn’t live up to our expectations, it doesn’t mean these won’t work in your system.
lots of factors determine a speaker choice - music preference, other equipment, room acoustics etc. The speakers you have listed all seem to garnered positive reviews so go have a listen and see if it’s your cup of tea.
Good Luck and have fun along the way.

Crutchfield will let you try them home for 60 days with full return privileges.