Thumper is usually on this forum alot. I found a link to his website http://www.hunterstyle.com/thumper/combos.php . There's alot of good information there. Shoot Thumper an email, he's a goog guy to talk to.
I know the shop I use was skeptical when I told them that I wanted to use ported E7's in my combo but they were really suprised by the quality of Thumper's work. Best bang for the buck is Combo #3
Site is in my sig... and "cheap" doesnt mean SLOW!! the ported heads have put a lot of 5.0s in the 12s N/A and low 11s to 10s on power adders!! and they are usually within a price of a tight budget!! cool?? check it out...