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.
Not to berate a point, but micool has 663 rwhp on his car, and he agrees. That's like 100 people telling you that if you ask me especially he his is the one who built the car up.
save your money for a worthwhile mod. a chip can do the same thing an aftermarket MAF does. Keep this in mind. What goes in must come out. You have all exhaust and no intake. Save up and get more intake mods or a set of nice gears.