Personnally I'd prefer the lighter draw, and hold over drawing & holding more lbs for some added speed. I think its more important to be able to draw straight back without bow movement, and be able to hold for as long as possible with your setup. Over struggling to draw & hold for the added speed trying to gain. Of course alot of that depends on your strength too. If 70 lbs is pretty easy for you in cold weather, then go for it.