Over on
www.bowsite .com there is a pretty good article about this. Down in the right hnad corner of the big game forums look for "Penetration, much ado about nothing".
What are you hunting? Whitetails? My setups routinely only produce 39 to 50 lbs/ft of energy and it's more than needed. The only time I don't get a pass through is when the offside shoulder bone gets in the way.
As for changing from ACC's? That's another issue. I've shot a lot of the different carbons and when comparing apples to apples (quality) the ACC's are not that much more expensive. If you like the ACC style arrow you can get a less expensive version made by Blackhawk (Owned by Gold Tip). They usually run about $85 a dozen. I haven't used them so can't comment on the quality, but it can't be any worse than decent AC arrows within the same price range.