Some of these posts have been very informative about these intakes and I guess I will chime in as well.
I have the MSCAI and I like it. I have never tried any of the others for this car and when I bought my car, I had it put on before I even drove it. So I don't really have a power comparison but either way, it's pretty damn fast and I love this car.
I chose the MSCAI because I don't want to be throwing a wrench at my car when I have to take it to the dealer. Let's say my car just breaks down somewhere and has to be towed to the shop. Am I going to be taking stuff apart on a highway or something? Not. It's a simple rationale, I have it put on and don't have to worry about it again.
As for hyrdo lock, here in Tampa it's an issue. I have seen several cars sitting in huge pools of water that have been choked out. It rains hard and fast here so the puddles get insane. That said, I will just have to be extra careful but oh well, them the breaks and I am glad it's on there.