Hi, A bit of advice please ... I'm using a Rel Q150 in conjunction with a Monitor Audio Silver Series 7.1 set up (9i,12i, 4xFXi). With the 9i's having quite a good low frequency response, I've got my cutover set to about 35Hz. I've experimented with the REL in a few positions and different settings, however it just doesn't seem to give me that 'rib-shaking' experience. Don't get me wrong, the REL is a fantastic sub, very tight and controlled. Question I've got is ... on my quest for more (quality) bass, should I be looking at a second Q150, or get something completely different? If so, what would you guys recommend? Thanks!