Truthfully, I've not tried many MX-compatible switches in a full board. Just Box Whites and Box Royals, besides the Box Navies. My daily driver is a Model M.
I haven't tried the U4Ts! They're on my list of candidates. Do you find them to be pretty good as a relatively light switch that still gives good feedback?
I do have some Emogogo Silver Grays which I think might be comparable, but I need only a handful of these switches so I wouldn't mind ordering some U4Ts if they're good.
Spring swapping is a good idea, especially since I don't need a ton here. I wonder how light I can go with the Clickiez before they have return issues... maybe I could lighten those a bit.