Last year we ordered our coop from CC ONLY, and we are so happy with it! Now, we found a discount code for it in some chicken magazine I'd bought a Barnes and Noble, and I'll bet if you go grab a few poultry mags you will find the same.
This is what we have, with the double extended run:
http://www.cconly.com/coop__hutches/cc-18_series
(Scroll down to the CC-18-R2-H)
The drawer that pulls out to clean the coop, along with an entire side panel that comes off, has been immensely valuable in maintaining a clean environment. And this year we are taking that panel off to extend the house so we can accommodate more chickens. I love all the doors.
If I had one do over, which I'm sure I will someday, I'd build something I can fully walk into. But that's not an option for my area, and this has been great. They have lots of other models too.
Craigslist is also full of people unloading old coops that have decided to upgrade as well.
Let us know what you do!
(Edit: last year the magazine discount brought it to $450 free shipping. It's rather expensive without a discount

but it is quality, no doubt about it)