We sell and have installed AirAid intakes here at the shop, so those are what I would prefer out of the two. Yes they will help out slightly on upping the power, it will usually net you around 5 HP (I think they are advertised as 5-7 HP).
I think we actually have a thread going on our AirAid intakes if you want to check it out. We have them at some great prices right now and they are very nice systems. Feel free to PM, call or email us with any questions, or to get special pricing that we can't post on here. Good luck!