Where have you been hiding? Haven't seen you around lately?
Welcome back!
You really will not see a HUGE difference in intakes from one brand to the other. I personally went with a short ram intake as I feel it did give the best gains and the sound at WOT was music to my ears. I went with the JWT/Ztube combo,
It can also come down to whether you are a DIY selfer and want to CAREFULLY re-oil your intake as a part of maintenance.
)There is a TONNE of info here for you
http://forums.g35club.org/zeroforum?id=266
R.I.P. SGT. John David McConachie 1921-2007