I'm not worried about the recoil from a 45 10mm or anything else i just like the feel of steel/metal better then poly. As far as the shotgun goes, yes it might be better but in a tight area i'd much rather have a handgun then a shotgun. Much more agile, lower profile ect ect. I only see one upside to a shotgun for home defense which is the spread and the "oh ****" factor of the guy breaking in.
I've had my eye on the 1911's for a very long time but i want something that i can add laser/flashlight maybe even a red dot site onto down the road. Maybe its the car guy in me but i like to mod my toys

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edit: you can actually pick 1911's up for around 700ish, might not be kimber but kimber isn't the only company that makes 1911's