I know lots of people here say, "Get the M22s and a good sub", but IMHO the bass from a sub isn't the same as that from good tower speakers. I use a sub with my M60s and get bass which is both low and articulate. The sub alone (an EP350) couldn't possibly do such a good job of handling ALL of the bass. The sub just isn't as good as the smaller drivers in the M60 at those higher frequencies.