I was going through the same options a while ago. The Cimarron was tempting because of it's lower weight, and the price too. But it's also lower in height, and as standing height is nice, it left the 4 man and the Redcliff. I knew I would mostly use it for me + a dog or two only, so went for the 4 man tipi. Got it 2 months ago, have used it for maybe 18 nights so far. It has plenty of space for one + the dogs of course, but doesn't feel unnecessarily big, especially when it's really wet and you want to get your gear dry. Have used it for two + a dog for several nights too, also with a stove, worked good. Pity that SO doesn't make a half nest for the 4 man. Now during the mosquito season I've used it with a regular pyramid mosquito net inside, which has worked ok. Needs some modifications still, but has worked out. Looking back, I wouldn't make a different decision if I'd be buying one now.
As a Finn I have no idea about the usual weather conditions during Colorado's rifle elk seasons
But I would say it makes a big difference if you're planning to use it with a stove or without.
A few pics won't do any harm....