I would suggest doing a search but you can pretty much end the thread after what I am going to tell ya.
There are no horsepower gains over a stock intake with silencer removed and K&N filter. The only thing you stand to gain from the ones you mentioned are looks with matching performance. Enjoy!
Edit: There is one intake that is above the others. Its a Strype intake with direct ketchup injection. You can get it from S&B.
Wow, that's the EXACT same advice I've given to folks numerous times in the 4.6 talk section... If you're ever in MN, I'll definitely buy you a beer