ORIGINAL: jmac_or
I would also ask why you want an 80# bow. Drop that to 70#'s and with your draw length, you will still be smokin arrows. The lighter draw will also help "control" the bow better. There will be less strain, allowing you to think about form and execution more. Other than that, I can not add to what has already been stated. Maybe get a coach if you continue to see those creeping shots days.
JMAC
Not to act like a tuff-guy or anything, but pulling back an 80lbs.+ draw weight is very easy. On many occasions I shoot 100+ arrows during practice and I don't experience any strain. Not to mention, any new bow I would buy would have a 75-80% let-off. On a side note, my dad used to shoot his PSE compound wheel bow at 90 something lbs. with a let-off of basically nothing. But all this talk is pointless, I will shoot what I feel comfortable with and I appreciate your advice.