Since a few weeks I am also running the Lightweight Titanium muffler in combination with OEM N55 midpipe, after three years of OEM sound-ownership.
MUCH BETTER! 
IMHO, I think that it looks better than Akrapovic. Also, you do not have to click the button to open the valves all the time (as it has no valves). It's a huge improvement, but not too loud - just fine.