Yeah those older metal B&W tweeters are doing you no favors fer sure. At your price point I’d put the Totem Bison and MoFi SourcePoint 8 on your list, and if you can stretch a bit the Fritz Carbon 7 SE or Revival Atalante would be outstanding choices, and I think Fritz might offer a trial period but not sure on that. If you wanna save $1000 these Usher Be-718 monitors are far superior to your 685s…
https://www.ebay.com/itm/186624117329
Hope this helps, and best of luck.