I did not want to move my battery and my engine-bay was a little tight, so I did not want to use a dual snorkel setup. And, I wanted something unique, something different from the Spectre Ram Air setup.
I found these guys RamAirBox.com based out of Hamilton. I ordered a 14x3S which is a single inlet box.
it ended up being more trouble than planned because the inlet was 6", and tubing for that is very rare. I had to special order tubing which was very expensive. But in the end, I like the look, and it's unique.
for a strict cost analysis, a Specter Ram Air box is your best bet. It comes as a complete kit, and if you're tight for space, they have single inlet models now as well.