From what I can see I have a choice of 2. The AEM or the K&N.

Would anyone say one is better than the other or have I missed any others?

 

AEM all the way no chance of oil in the engine (where it's not wanted) FTW!

 

Thanks. AEM it is then

 

Not a problem, I was glad to be of help.

-Cameron Keffer

 

There are a couple more options than the ones listed:

MazdaSpeed
CP-E
Ingen
Bombz

 

I myself would go with CP-E since it is guaranteed no to throw a CEL

 

I have the mazdaspeed and have had no problems with CEL's, also if I understand correctly it is prettymuch the same as the AEM kit, and I know for a fact it uses an AEM filter, so I don't think there will be a problem.

-Cameron Keffer