Stay away from a MAF until you are ready for a blower. The stock MAF can handle lots of HP. After-market MAF's must be dyno tuned and you won't see any gains except what you would get from any dyno tune. Avoid the C&L 80 mm MAF. Lots of used ones floating around now as guys are taking them off because they result in lean condition. No matter what, any MAF will need a dyno tune.
I have one, you can have for a lot less than $150 if you want, and I paid $250 for it. Research it on your own if you like and if you still want it, let me know.