Honestly if it is to be a utlitlity gun, shot all the time, I would keep the sig. If you want something to hold on to as a safe queen I would go with the Colt. That Sig will run and run and you do not have to worry about ruining any collector value, you will holster it and run any ammo you want through it. What need/purpose do the pistols serve to you? That is what the trade comes down to.