Exhaust tones-Tubi/Ansa/Stebro/Borla any real difference?

From what other 355 owners have told me and what claims tubi makes, there is supposed to be a 7% hp gain and a 50% weight reduction over OEM. I could care less about that, I'm just looking for a product that will give a little more of an F1 race tone. I liked tubi's tone but it was not deep enough for my tastes. Borla is known to make very deep sounding systems but I'm afraid it may be too overwhelming at higher RPM's. ANSA seems about right. Only heard one on a 348 but sounded pretty good.

Thanks for the help.

Seb