Iv'e been looking at heads for a long time, and Id say go with the Trick Flow twisted Wedge there $1000
If money is no object go with the AFR 165 or 185 heads $1300
remember that you have to buy Roller rockers/pushrods/lifters with new heads. The power you get from these is gonna be very close to the same.
check out both there web sites and read the specs and flow rates...