Thanks for all the input guys. These seem like they will work pretty well for whitetail use, especially with being able to get a pant to fit over them to muffle some of the noise. If these were the same price as down pants I don't think I would spend much time considering them but for the price they seem worth the weight and space penalty for the budget minded hunter.
If I do end up getting them ill try to remember to update the post so it has more info for others searching in the future.
Any other input from guys who have used them in the past?