Sub s for Dali Megaline system

I am interested in a subwoofer system (1 or 2) for my two channel room. It consists of the Dali Megaline III speakers driven by McIntosh electronics--C1000C 3 piece preamp and 2 sets of MC501 monoblocks. My listening tastes vary widely and includes classic/orchestral, classic rock/pop/r&b, and specific female vocalists. I am strongly considering a pair of Jl Audio Fathom 212's (the Gothams seem way too big). I'd appreciate any input. Ray.
The choice might be more related to your room size. I am assuming you have a really large room with your Dali's. If that is the case you may chose to move a huge amount of air, (think pant legs waving like a flag in a stiff breeze). The JL Audio subs will do that. If you want the fastest, tightest bass possible then the Wilson Benesch Torus would be you best bet. (Please disregard my opinion since I am a dealer for Wilson Benesch).
Acoustat6, The Torus is -3db@20hz. It's flat at 25hz. I've had the Torus, pairs of JL audio's, Rel's and Martin Logans all in my setup. I didn't buy the Torus because I couldn't justify the cost of a pair of them in my almost full range system. They go plenty low if you listen to music which doesn't contain a lot of organ or you are doubling for HT. Qualitatively they were the best and I wouldn't hesitate to buy them if it were for 2 channel only and I had a lot of money that my wife didn't have better use for. - Jim
Aldavis said, "The Torus is -3db@20hz. It's flat at 25hz."

I have not seen that spec anywhere. It is not on their website that I have seen. Correct me if I am wrong. And for $6000 it cant reach 20 hz....?

Actually if you want to "really" take it to the max,there is the Eminent Techology TRW-17!!

An experienced audio friend had this demoed for him,and was flabbergasted!!

This "is" truly a serious design,but requires a commitment from the in re-doing some vent work in the room/house.

It is reviewed on the "IAR" web-site,where it is proclaimed "the only subwoofer".

Looks serious,but I have not heard it and never will.I've got alot of experience with REL's better offerings and do think they work well.

The room size,and what the hobbyist realistically expects(aside from the financial considerations)will dictate the ultimate success.

Good already have a great speaker-:)