Shawn, welcome(to among other things our Sean, Shawn and Shaun membership club). I'd strongly suggest that your next purchase be QS surrounds. The M80s have good enough bass that a sub, while desirable, isn't essential at this time. The M80s can also form a "phantom" center, making it possible to delay the purchase of a separate center speaker. There's no substitute for the surround speakers, however, and without them you don't have an HT setup. For both 2-channel(using DPLII, etc.)and multi-channel material they substantially add to listening enjoyment.
