Thanks for all the great opinions. As for the 1911A1; I use to have a springfield armory and I really loved it. But if you look at my current list, I have a Sig Sauer P220 45acp. Personally, while I love the 1911A1 model, the P220 is a much better gun. So I believe I have that area covered. At one time I bought guns more as a collector and for fun. I've sold and given away quite a few of them. Some I wish I hadn't gotten rid of. But currently, I want my collection of guns to be such that every single gun has a purpose and if a scenario arises, that I have a weapon that can handle it. As I said in my opening post, the guns I have and their purposes are:
Remington 870 Pump 12 gauge 2 3/4-3" "28" and 20" barrels Shot Gun (Duck, Geese, Pheasant, Home Defense)
Remington 7mm Magnum Bolt Rifle (long range - Deer, Elk, Moose, Bear, Antelope)
Marlin 30-30 lever action Rifle (Short range Brush Gun - Deer, Elk)
Winchester mod190 22LR Rifle semi-auto (Small game, rabbits, squirrel, plinking, etc...)
SigSauer P220 45acp semi-auto Pistol (Home defense, Carry-Self Defense)
S&W Model 13-1 357mag/38spl Revolver (Home Defense)
Walther PPK 32acp semi-auto (Carry-Self Defense)
Single-Six 22LR and 22magnum revolver (Plinking, small game hunting)
44 caliber Black Powder Navy Pistol (Hell if I know)
Some of the guns do overlap even though I didn't mention it. I.e. the S&W Mod 13 357magnum can also be used for some hunting if needed. The only area I think I was sort of missing, was a gun that could handle a "Panic" situation. Basically a situation for large numbers of people. Not paranoid or survivalist; just thinking of a scenario that couldn't be covered by the rest of my collection. So; I had narrowed it down to an AR style .223; an AK style 7.62x39; an M1 Garand 30-06, or an M1 Carbine 30 cal.
The AK style is probably the most reliable and practical of the bunch. Ammo is cheap and available. It's a 30 caliber and has ballistics similar to a 30-30 rifle so soft points can also double as a hunting gun. 30 round clips. Simple and indestructible. Kick butt gun. And it can be had for around $500-$600.
The AR/M16 style also has readily available ammo that is somewhat cheap. Also 20-30 round magazines. Other than varmints, it's basically only good for crowds of people. Major disadvantage is the price. Roughly $1000.
M1 Carbine is a good choice for the caliber. Large magazine capacity. Easy to shoot and maintain. Biggest problem with it is ammo availability. I can get one for about $500.
Then there's the M1 Garand. 30-06 is a very popular caliber. Doubles as a great hunting round. Loaded with some 55 grain accelerators, it can be similar to an AR/M16, but with much better accuracy. However; it only has an 8 round magazine. But I also like the nostalgia of the rifle. They don't make any more of them and they are a great piece of history. I can get one for about $600.
I believe that with any of these 4, that I can fill the gap and complete my collection which basically includes a weapon for all scenarios and situations. From walking down the street and self defense; to home defense. From Bird hunting to Moose and Big Horn sheep hunting. From survival hunting and survival protection against other people. From wide open spaces of 400+ yards to dense forests. From open carry to concealed carry.
I believe I have all the categories covered. I just need to decide on the assault type rifle. FWIW; I'm leaning towards the M1 Garand 30-06 or the AK style 7.62x39. If nothing else, get the M1 Garand because they will eventually no longer exist; while the AK style with probably be around for decades more to come. Thanks again for all your opinions.