Anything but a Double Bull. They are as overpriced as aMathews and Lone Wolf treestands.....
Your best bet is to actually find a place that will let you sit inside some of them to sit what fits you. Washington Hunter's comments about the width of the Doghouse is very accurate. For some archers it can be a tight fit. The Doghouse TSC is 8 inches wider so it might be a better fit despite the slightly higher price. Don't rule out anyting unless you can try it first.