I gave the Gibson dual exhaust on my 09 JK.
I love the noise coming from it, it is loud as F$%#!!! around the 2,000 RPM!, if you have people that u drive in the back they will hate you lol. Long drives on a high way gives me a headache. In the end, sounds Great!!!!!!!
I got the stainless steel one, does not rust at all, but the tubes themselves do a little bit.
I did it by my slef. it was very easy! or you can do it in minute muffler for around 50-75$
Anton