I think the answer is anything is better than stock is enough for 95% of the people. So buy the inexpensive stuff imo. VRSF or Big Tom will do just fine.
Having my helix($$$) or your vrsf is not going to make a lick of difference in 1/4 mile times all things being equal.
Link for more intercooler pr0n:
http://www.e90post.com/forums/showthread.php?t=711491