Iam after the same answer too. I need to chip my 145 too but dont know which one to go for.
At the moment I,m thinking of an induction kit rather than a replacment filter. But k&n dont do one for my car, so I was going to a get a foam Pipercross filter and adapt the hoses to suit. Also a powerflow exhaust as they are made to your liking where as noice is involved. Very cheap for a full stainless powerflow system , compared to supersprint and sebring.
It may be an idea to look at powerflow for exhausts depending on how much you want to spend. Try looking at whats availible in the aspect of filters then you can see what your able to do .