After reading all the B.S.
The most affordable highest flowing head OOTB ready to run in MOST cases is the Trick Flow.
The next stage is the Indy 360-1 or 2 top end, for a few more bucks and work. :D
The final stage is the W8 or 9, have to really open your wallet at that point.
Get yourself a set of Trick flows and Harland sharp rockers and rock on!