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
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.