I often consider doing the same thing. When I take out the guns I think I would trade/sell, I can't bring myself to "pull the triiger" on getting rid of them. (If I did ever do it, a high-end 1911 is the only thing I would do it for. Everything else I kind of want is more attainable by saving and keeping what I have.)
You ARE basically trading 2 1911's for a 1911 thats twice as good as either of them....(just trying to help you justify.)