Eisenhaus

Hey, so i love the exhaust on the f430, but it would sound so much better with a little more kick to it. Just a tone difference and a louder grunt. The eisenhaus sounds good, just woundering what you guys think or if anyone has one even on a 360. If so, how much power gain did you get and how much better was the sound. So far, the only one comprable to my liking is eisenhaus. Any other exhaust brand opinions would be helpful as well. Thanx in advance.