the blox manifold looks really nice for the price.
only reason i got the skunk 2 is because i picked it up for $130......so i thought, why not.
edelbrock has some nice manis also. i dont really think it matters.......blox would be my choice just because of the price difference.
the difference in manifolds will really come if you were to get a turbo manifold such as the victor x from edelbrock. but the performer x, skunk 2, and blox all have about the same length runners and about the same shape and size plenum. Notice, i said about the same, and with the smal differences, each will perform differently.