Here's a quick (and crappy) pic of some of my CO models. Three are absent from this display: HG 737-700, HG 747-200, and HG 767-400--they're in their boxes right now. I still need the HG 737-900, and all the "meatball" scheme IF200s (707, 747-100, 747-200, DC-9 (black), DC-9 (red). I also plan to acquire the GJ 757-200WL and 1:100 Skymarks Supreme 737-800 whenever they're released--hopefully this summer. Also got something special on the way.
The models in this pic: FM 767-400, FM 727-200, HG 757-200WL, HG 757-300, HG 777-200, SJ 757-200, IF200 727-200, HE Premium 737-300, GJ 737-700, and a Brad Shinn DACO 737-500 in 1/144. (Note this isn't how I normally display them--in fact I don't have a permanent display of my CO fleet as of yet.)