I don't know if I'd trade, but I definately want a Coonan. It's kind of an apples and oranges thing.
I was thinking about trading in my Browning Buckmark on a Ruger SP101 in .22lr. It's all a matter of what you like to shoot I think. Revolvers or Semi's. Personally, I like revolvers better, and would have a hard time trading one off.
Good luck. The .357 1911 is a cool concept, and I think it is going to be on my list.