Which catback would be best?

[Amon]

Hey there,

I ve been searching for catbacks a while now, and can't make up my mind.
As the Fujitsubo and the Blitz seem to be quite quiet, I d like to buy something louder.

It should scream or be loud at any cost, I d prefer a deep growl.
As I like Mufflers, I thought the HKS silent HiPower would be the best choice. Theres one video on youtube where this catback can be heard:
http://www.youtube.com/watch?v=D8KqueVhFJw

Now someone told me that theres a very noise Kakimoto exhaust available for the Aristo?!

What do you think about the HKS, is it louder than the Fuji and Blitz?
Where can I find those catbacks, which shops sell them?
Does anyone know something about the Kakimoto?

Thanks for being interested in my problems

Cheers