Love your collection art, thanks for sharing...
I've been tempted on several machine putters and others in the past...I rarely pull the trigger...putters are different for me...I guess there's no part of the game where you use a single club as much..all clubs get less than half as many strokes and many less than a quarter or an eight of the action which for me makes for different priorities...I go based on performance only...when things go wonky and I need a change I'll mess around with one or 2 others that catch my eye or I have putted well win in the past...then 1-2 shootouts 50 shots each, 25 5-7 feet 15 10-15 feet and 10 25+ feet...most makes goes in the bag...no changing until another shootout...I went to this 4 years ago when my putting went to shit and I was having a hard time choosing a putter which in turn I believed exacerbated my inconsistency...
The practice involved in performing the shootout usually gets me out of whatever funk I'm in and what used to be the week part of my game is now the strength...if that doesn't work, 50 putts a night on the eyeline usually does the trick or making 50 4 footers in a row...maddening drill when you're shaky...
Would love to have a putter collection...with limited funds though I think I get more total utility out of hoing the striking clubs because there's not as much performance impact due to change...er...more equipment benefit there for my overall game...

not sure this post is at all logical...caught the flu, 2nd day in bed, might be rambling...