I would love to have a 3953 and a 4586.
I bought a 5946 and love it.
When I bought my 4566, I almost bought a 4586 instead.
Trouble was, the 4586 had been carried and shot a LOT more.
It was pretty rough, and the 4566 was in sweet condition, for the same price.

As far as double strike capability goes, I like it.
I've had rounds that failed to ignite on the first strike, quite a few of them, both hand loads and different brands of factory ammo.
Every one of them fired upon a second pull of the trigger.

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What would Jim Cirillo do?