If you really want to do your L-shaped room some justice, the UMC-200 has a very powerful manual feature in P-EQ. It just so happens that HomeTheaterShack has REW, so if you didn't already know, their is a section of this forum that can get you started and with the microphone of your choice you can do wonders. To me REW and a P-EQ will take you past the "set it and forget it" room correction softwares.