Which Sub Woofer is good for my 2 channel system


I want to add a Sub to my 2 channel music system and would like comments and suggestions on which one. My music room is 12 x 16 and I am using B&W 805 Sig's. If it matters my source is McIntosh 352 amp and the C2200 pre.
I do not like booming,rolling,load bass. Something, tight,fast,smooth.
Music choice is: Light Jazz,& Vocals.
My first thought was 12" or less. I use a sub in my HT system but that is NOT part of my 2 channel.
Budget amount, I would like to keep at 2000.00 or under for new sub.
Your suggestions would be appreciated.
Dave
valleyplastic
Just auditioned the Rel Strata lll That has moved to the top of my list. Thanks for that suggestion. I do want to audition the Depth, hope to do that this week also.
I appreciate all your comments.
Dave
The 805 sigs are keepers for the moment, I hope I find the Strata in the next week or so before a pair of Revel Studio's show up that I can't live without.