5.7 Hemi Conversions - XVMotors? Arrington Chip Killr? Other options?

indy cylinder head now has a mod man intake system for the 5.7/6.1 it has an interchangable top,,single 4 dual 4 or 6 pac, dont rememebr if it is single or dual plane,,was less the 500 when i last talked to them,,,
from the Indy price list:
5.7 = USD 399
6.1 = USD 499
with top of choice, fasteners and gasket
I found a web shop who is selling the XV intake for 499 too so I'm again undecided... :-(