Research for subwoofer

My suggestion is that you might want to further define/refine what you are trying to accomplish.  There is the bass you hear, the bass you feel and the bass that shakes the room.

Getting "more" bass is not hard, but getting the kind of bass you want where the subwoofer/s play nicely with you room and you speakers can be more challenging.

I’ve owned subwoofers from Power Sound Audio, REL and SVS.  They are all excellent in their own way and they can all be made to give you good bass.  I achieved the most sense of bass power from the PSA, the absolute easiest integration from the REL and ever so slightly the best tone from the SVS.

My recommendation is pick one of the better brands with a good "try at home" and return policy and you might luck out and find the perfect sub with your first try.

snapsc - That is what I have chosen to do.   Budget was under 2k

Trying REL first.   I am looking for more Bass that I hear and a fuller soundstage

I’m curious if any of you have hit latency issues with SVS subwoofers with the DSP. I use a MiniDSP preamp where I send stereo outputs to the amp and a separate output to the powered sub, and I find I have to delay the mains by 12ms to get them to line up. I found a number of 6ms on the SVS website, but 12ms seems to be what works in my room. I had originally tried 6ms and it felt like the sub was barely on since it was playing late, which is rough for e.g. a bass drum.

I don’t think the Luxman that OP mentioned would have this feature, so I wonder if DSP would be a bad idea here compared to an analog sub with no latency.

@kuttler, which REL are you going for? Are you planning on a pair? 

T9 single unit