I've narrowed my search to these three subs due to space constraints- I have Def Tech Procinema 100's w/ a C2 center, run with a Denon 2802. Sounds great so far Now the sub, I am leaning toward a Rel q150e, but am also considering the Velo spl800 or the Carver Knight Shadow which I haven't been able to hear. Any feedback or suggestions? The hookup for the def techs is speaker level in to sub then out to speakers set speakers to large and hook up the lfe channel. None of these have both speaker level in & out but the Rel hooks up in a similar manner if that makes any difference. Thanks- I hope to buy SOON!