I was thinking of the MRT V2 also. If you have any time available, i'd like to see if I could come by and hear yours. The muffler shop I am trying to deal with here keeps telling me I will not be happy with anything unless I hear it first. I was also looking at doing the magnaflow single muffler at the mid section, then straight replacement pipes out back. What I don't want is alot of volume all the time, only when I get on it a little, and I heard the 2.0 is kind of drony and loud.
I did for about two months, then one of the LS3 cans developed a bad rattle. Possibly a heat shield pealing back inside the muffler. Strictly coincidental, it could've happened to the original owner eventually. This only accelerated my purchase of the MRT V2.0 axle backs which I absolutely love and endorsed in many threads here.