Efficient Dynamic Speaker with low-end punch?

Classic Audio Reproductions can suit the bill with either the T-3 or T-1. Both are about 96-97 db with real bandwidth to 20Hz. Also a very revealing speaker and an easy setup in most rooms- I have mine about 6" from the rear wall. Easily driven by tubes or transistors; Philip O'Hanlan who markets Halcro in the US has a set in his system.

You didn't mention a budget, but for <$1000 I recommend you check out Klipsch RF7's and the previous model KLF-20's.

Thank you all for your replies. My budget is about $4k.... I am also looking at DeVore and Proac.

FYI I have a Fostex fe206esr back loaded horn 98db 1 watt 40hz-20khz $2500 shipping inc a great deal and works very well with small pass amps.

I second the Reimer line. The bass on these go very deep and clean. My 18 tube watts matches well with the Teton's.