I love my FI exhaust and HFC. The quality of materials and workmanship is superb. It has a very aggressive look. This appeals to me but others may want a more stock look.
As far as sound goes, well, I got FI because thats what sounded the best to me. It isn't going to necessarily sound the best to everyone. I'll tell you one thing though: I've been complimented on the street by guys driving camaros, mustangs, and other muscle cars about how good the exhaust sounds. They usually hate how imports sound. I get many compliments on the street. Tony just matched the exhaust to the personality of the car very well.
The exhaust does not produce any noticeable drone unless there is a significant amount of engine load (going uphill).
The Berk CBE is nice, but it doesn't appeal to me due to my personal taste. If someone else likes it thats great. I'm glad we have several options at our disposal.
Edit: Due to Coilovers and crazy low profile tires my clearance on the exhaust is 2 3/4 inches :O
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