I have the Rythmik LVX12 and a pair of REL T5i's. I use the Rythmik in a room more for movies but do listen to music sometimes there. It's currently being used with Salk Song3's. It's a great sub. I use the REL T5i's with some Clearwave Duet6 monitors. I was talking to Jim about building some Rythmik based 8" sealed subs because I like the Rythmik so much. However before doing that I had an acquaintance selling a T5i so I tried it because my Rythmik is too big for my 2-channel area. I was really impressed. So much so that I got a second one. It's obviously a different animal than the Rythmik. I usually don't even use subs for 2-channel, but it blended so well and easily. It's very detailed, fast and punchy. Obviously doesn't go super deep but unless you're listening to electronic music a lot it's deep enough for me. And, if you can fit a T7i or bigger it will go deeper. I'm not saying REL is better than Rythmik, but I love all of my subs so I think its more of a right tool for the right job situation and you can't go wrong either way. The Rythmik is also fast and tight and I'm a fan of servo subs. I do think the REL is a bit more "musical" in that it has a bit more detail and seems to match the speaker's tone, but that could also be the setup in that I'm using the high pass connection on the RELs vs. through a surround processor on the Rythmik. You can always contact Jim and have him build a Rythmik based sub that will match your SB's. Enjoy.