The later ones just sound kind of weedy. This one though, the C12s, sounds like it will rip your face off and then eat it. Apparently though I am the only one that thinks this cause it is so hard to find sound clips on youtube. I am still going to try god damn it!
This one gave me many gasms.
I think it may have been the titanium exhaust that lost the sound. These were stainless steel I think.