Well I purchased the 215. It's probably overkill but hey for $99 why not? It compliments the Klipsch's nicely and gives me the bass I was missing. One nice feature is the controls are mostly on the front of the sub. It's sitting right next to me as I sit here so it's easy to adjust. The power button on the front will come in handy in the evenings so I can easily turn it off when my kids are asleep. As for the sound quality it's not bad. Surprisingly tight and not boomy. I haven't noticed any bottoming but I'm not blasting it either.