I originally chose the RX-4750 before it even went into production for one simple reason. The Series 1 SSEi'* have a tight spot with the double washer bottle (for headlight washers), and that filter (from the specs I read) fit and filled the small area we had to play with in the most efficient manner possible.
It also provides a location for the IAT, and a broad, flat base for adding a heat shield. You may find something that suits you better, but it'* proven a popular affordable solution for us.
has the best prices on it.