Seriously, you might look into slide conversions.... less money, no paperwork and you get to shoot different calibers, barrel lengths, sights/optics, etc..... digging out my 1911's for the pic in the other thread made me think about the conversions I've got for that platform that I haven't shot in years! It's not exactly the same as adding guns, but it doesn allow you to multiply the variety of your collection.
-RJP