Indecision is your friend.
Start saving your money in a gun fund like everyone else has told you and then do an EXTENSIVE evaluation of all the 1911s out there and which one you would like the best. By the time you've checked 'em all out and decided (and changed your mind and decided again) you'll probably have enough money to buy it.
Layaway might not be a bad idea but to me it locks you in to ONE gun when you might change your mind or a 'real deal' might come along. I'd prefer saving to the 'gun fund' and then you can spend it however you want.
My personal recommendation for a 1911 where concealed carry is not the main concern is the Springfield Range Officer.
http://www.springfield-armory.com/armory.php?model=27