David
I personally use the Purolator brand from Advance Auto Parts...but I change it so often it really doesn't make a difference. I'm anal with my maintenance and change things way before they probably need to be changed. I change my filters every 15kmi.
IMO, you're the exception, not the rule. There were dozens of people on Maxima.org (myself included) who had their MAF's fail and virtually all pointed to the K&N filter. No concrete evidence as it's hard to prove but it's up to each individual. Who knows, maybe the Infiniti M MAF's are better built and thus K&N's don't kill them, but after needing to spend $200 on a MAF for my Maxima back in like 2007 when I was a broke 20yr old within 200 miles of installing a K&N filter, I told myself 'never again'. I do use K&N's on my motorcycles, because there is no MAF to worry about.