my EP350 does very well. in fact, for my apartment, it does too well, but that's because my apartment is small

i have heard a velodyne and an hsu sub. i wasn't too impressed by velodyne but the hsu was very, very nice. if i could start all over again, i'd give SVS a try, just based on the comments of other board members. But this is not to say the EP350 is a bad sub. It's quite good.