NIB, several comments.
1) if you are living in PRK I would strongly advise against selling ANY of your firearms, especially if they shoot well for you. You can always save up for a Wilson.
2) Wilson, might get a lot of flames for this. They make great magazines, but aren't their 1911s made with SUPER TIGHT tolerances? This could be a bad thing, especially if they require a lot of lube which in turn can attract crap. Don't get me wrong, I love 1911s and one saved my father's life in Vietnam, meaning I pretty much owe my life to that pistol as well. It rattles - genuine 1911 but it is no prom queen. Does not need very much lube and takes a licking like a champ and asks for more.
I'm not a 1911 expert, could very well be wrong , but it is my understanding that the newer ones (Wilson, Infinity, etc.) have supertight tolerances as opposed to some loose clearances (close fitting where needed but not everywhere). Have heard rave reviews about the reliability of Wilsons, however, but I wouldn't trade in three functional weapons I am familiar with for one!
9mm - as you probably know, ammo selection frequently trumps caliber. A good 9mm hollowpoint will cause more damage than a 230gr FMJ ball given an unarmored frontal shot. Got armor? IIRC due to the sectional density of the 147gr 9mm, it will out penetrate a .45 230gr ball. But if you go around using 147gr ball in a 9mm, you have a very poor chance of stopping without a direct CNS hit. Not much better with 230gr ball.
Surely 115gr 9mm +P+ hollowpoints are going to hurt the bad guy *very bad*. But then again, these don't penetrate the best. With any caliber you have to choose what the most likely scenario will be. When I carry concealed, I usually load the primary magazine with good med. wt hollowpints and the spare magazine with FMJ, just to have the choice.
I too prefer the .45, but it's just because that is what I grew up with. Love the 1911 as well, but got a less than stellar start with one and ended up trading for a USP .45. Recently, however, I have discovered the P7M8 and REALLY want one of those. It "only" holds 8 rounds of 9mm... but it's one hell of a platform.
Summary: keep what you have and save up for the Wilson is my honest recommendation.