To follow up on the last poster your budget might get you an entry level Standmount Audio Note speaker. High sensitivity, easy to drive and a lot of bass at good volume and maybe the best bass and dynamics you'll hear from any standmount at any price. Works well with low powered tubes and the speakers are upgradeable later.

Try and find a dealer to audition...Dynaudio is good mind you they were in the running - but they need a lot more power which costs even more money and then it still wasn't as good to me.

As for very impressive deep bass you'll need a sub(preferably two) - that is true whether you have a standmount or the Dyn 82 http://www.triodeandco.com/Prod_Loudspeakers.html