The Legmakers are probably the best but the most expensive. You get what you pay for. The have the Mopar one but only have it because it was almost free but I like it. There are a quite a few out there. All depends, like most mods, what you are willing to spend.
Its a matter of how much money you want to spend and what kind of look you want, They ALL will give about the same performance gain, Every magazine has done one test or another on CAI's, if your looking for sound the cheaper eBay models give great tones for $69.
You could always try to find one of these mythical beasts :
The AirHammer HO! lol.. I will probably be selling mine some time in 2015.. We shall see.. But in all reality, both LMI and Big Bully make a good product. I had the Big Bully before I bought the AirHammer HO. And I've seen plenty of LMI products up close, and they're works of art.