I hunted with the Ultratec for a couple years.First the 2001 model and then the 2003 model.The only issues I had were trying to stalk in deep cover and/or crawling on the ground.The Ultratec was a bit long for that but I am only 5'9" and that does make a difference.If you are "oversized" like old Arthur,that shouldn't be a problem but you obviously aren't that big considering the 29" draw.I can shoot the bow sitting flat on my but so the a-a isn't an issue with that either.Just the crawling around.
If you put the bow on a 4 wheeler,you may notice it catching more tree limbs and bushes too.
As far as a tree stand problem,I have had none to speak of.But I also don't use any railing on my bow stands either.
Of course the faster the bow is capable of being,the more ke it is going to deliver ,all things equall.That is the main reason I stated with your poundage and draw length you will have no problems with any of the 3 choices.
Don't worry too much about it.Whichever you choose,I am sure you will be happy with it but it looks to me like you really want the Protec so go for it.