CAT PIPES: F:I. vs BERK vs. KINETIX

UNKNOWN_370

I'm already planning on my first mods. I already decided on the injen long tube CAI and cat pipes as my first pair of engine mods before puttting on an exhaust. 3 companies make cat pipes. (Catalylitic converter and test pipe combined in one unit)

Fast intentions seems like the most trustworthy being that they are the original designers of this part and well known by the Z community. On the other hand Berk is very reputable and is also known by the Z community as being top notch. The icing on the cake is it also costs $100 less.
And finally, there's the Kinetix cat pipe. The most affordable of the 3. At $390 its a steal. Thing is. Some people swear by kinetix and some don't. But most say customer service is superior to most other companies and they stand by any defected product.
All this is gathered from wide spread research on google. I was just wondering if you guys have any feedback or experience with either or all of these parts and just kinda help point me in the right direction...
Its always nice to save money but not at the cost of an unreliable product. Thoughts or reviews gladly taken. Thanx.