Get in here and vote!

[trigger945]

I think @FUBAR was referring to the internal locking sysrtem (ILS) located in the mainspring housing of Springfield 1911's. You can lock the gun through there, similar to locking a new S&W revolver.

Of the 5 that the OP has listed, my vote goes to TRP Armory Kote based on experience. But for that price, I would suggest looking into a Les Baer instead.

[Schlamoo]

TRP, the ILS is easily removed by replacing the mainspring housing. With that said, not on your list, my vote would be for Wilson Combat.