Silverline "Prelude II" (mAKE SURE THEY ARE VERSION II). The last retail I saw on them was $1495, but you should be able to score a mint or clean pair between $900-1200 They are a column speaker with a small footprint, and take up little space.
They work nicely with copper based speaker cables like Analysis Plus Oval 11 or upgrade to Audio Art SC5e speaker cable. Once they break in, and depending on your equipment, they can compete with any speaker $5000 and under.
One other contender is the Totem Arro which is grossly overpriced at almost $2000. Even used, they are expensive, but the imaging is excellent.
