Getting a Panny SC-BTT350 HITB...worth it for townhouse?

[linkgx1]

Okay, so through my job's discount program I can get the Panasonic SC-BTT350 for about $199. Now, I live in a 3-level townhouse and will be in the basement. The walls are thin, and sometimes I can hear their TV. You can't really hear sounds upstairs though. Most of the time the neighbors aren't down stairs. Now, I'm wondering if it would worth it to get this pack or just a standalone 3d-Bluray player? I'm just wondering how loud a 5.1 system could be and whether or not it would be over powering! I don't want to be evicted!