The IAT sensor placement is why I chose RAMAIR after already have triples fitted, it's really a simple elegant solution that comes with everything in a nice little package.
I would suggest reading some about foam vs the fabric style, one filters better, one allows for less disturbance of air flow. Cost is similar, sound of them is fairly similar, really up to you on which company you want to support.
Your ultimate power goals can dictate one over the other, e.g. when is enough, enough, power wise?