Why not just fog it?
The advantage is that you go from a roughly 2.5" OD intake to a ~3.75" OD intake in less than 5" from the filter box. You use your regular filter (recommend K&N, TRD, or Green filter) and filter box. Costs about $15 to $25 with most parts from Home Depot or Lowes. What I like about it is that the power band feels smoother up and down. I really like the way the engine spools up. Most likely the same effect you would get from the Typhoon. Note, I am claiming no HP gains, but the car is more responsive and the engine sounds less strained when mashing the pedal hard. I am truly loving it.
The disadvantage is that it can never look as good as the Typhoon. Another disadvantage is that you have to make it by hand. Third disadvantage is that you have to cut the existing intake.
It worked nicely on my Z3 and I like the feel of it on the tC.
Cheers!