I have been reading all of the favorable comments about the SVS subs for a long time, and I am wondering whether that would be a good choice for a second sub in my setup, or whether I should stick with what I already have. I have a 7.1 system. The fronts and center are the M&K S-150 THX and the four surrounds are the M&K SS-150's. My prepro is a TAGMcClaren Av32R. My current sub is an M&K 125 MKII. My room size is 16 1/2 feet wide and 16 1/2 feet deep on one side, with the back wall on that side only extending across 1/2 of the room. In other works, on the other side of the room the wall goes back 22 feet. So there is like recessed area that is 6 feet deep on one side of the rear of the room. The room has vaulted ceilings starting at eight feet high in the front and rear of the room, extending to a peak of about 15 feet in the middle of the room. I am happy with the current setup. It is very good for music and movies are just awesome. (I am using a JVC G-15 projector with a Rock+ and a Stewart GreyHawk screen.) I am thinking though that I might actually benefit from having a second sub. I was initially thinking about adding a second M&K, but I have heard of others who have added an SVS to their M&K system and have been very pleased. Should I add an SVS, and what size would be appropriate? I was thinking of the SVS 25-31PC. I would only be able to put it in the front corner though, with the M&K sub going in the front also, between the center speaker and the left or right front speaker. Would this be a good idea? Thanks in advance for any opinions and suggestions.