As far as drone goes with this new cat back system, it does have some drone around 2000 rpm but its nowhere near as bad as flowmaster 40s on my 79. Sounded like the interior was going to disintegrate! The thing is though, when you floor it, the sound from the L98 is fantastic. It honestly just feels like it want to just scream and not stop.... It actually find it hard to stay off the throttle because the pull is awesome. IMO, The key to enjoying it more though, if you happen to have an automatic like me, manual shift it through second and third. I find you get a better exhaust note that way plus you can enjoy engine braking! Bit of a delay sometimes between shifts so that's no good but, hey, that's what I got!
Range... totally agree! It's worth taking a shot at building your own because you just might find you actually like it. That's assuming you're set up to do that type of work. I priced out various OEM style replacements and they all where going to add up to between 700-1000 by the time it got here. At the time I was looking at C6's with 2 centered tailpipes and the Sledgehammer and thought "yep, that's what I'm gonna do!". It cost me somewhere in the neighborhood of $250 for parts and my time. I like that better!