New intake installed
 

Didn't feel like spending the cash on the injen or another intake, so I did this :

http://sotb.thcnet.net/mazdacai.JPG

3" Heater ducting, clamps : $11
K&N cone filter : $35

I was contemplating going all the way back to the engine with the ducting but I couldn't figure out a good way to mount the tube after the maf... and I figured the ducting would get too hot because it was so close to the engine...

Sounds great, driving feels smoother, my car can finally breathe! :)