Auto Salon Magazine did a test last year some time (issue 51) with a lot of pod air filters and the apexi power intake pod, which i assume is the apexi pod filter you are talking about, and it did pretty crap. Its flow was 533.3cfm and its filtration wasnt the greatest either. For $125 you would expect a hell of a lot better.
The pod filter that actually won with a flow of 601.2cfm and a pretty damn good filtration was a 3A Racing pod filter that can be picked up on ebay for around $28.95.
Just because it is a well known brand doesnt mean its any good. I know which one i use and reccommend and i keep nearly a hundred dollars in my pocket