I was looking at an K&N airfilter upgrade and also an upgrade to the MAF. Of course the MAF is about 10 times more than the K&N. Since they both deal with airflow I was wondering if it is worth doing both or is one way more effective than the other?

Lots of folks have done it. It remains controversial, partly because of advice from tuners who are too lazy to map out the VE table, which is a PITA on a Dynojet, or people who don't want to pay someone to do it right. It's somewhat more popular with people who do their own tuning because fueling can be mapped on the street. It's just more time consuming.Interesting, I wonder why I never heard of doing a MAF delete on this site? Anyone do this?