TWL makes some good recommendations. I've heard the Cain and Cain Abbys (w/the Fostex 166e drivers) and they are fast, coherent, dynamic and exciting to listen to. They are also efficient and easy to drive. The REL should work very well with them. Start the cutoff at about 70Hz and work your way down. Also, as a bonus they are awesomely constructed and finished.
I've also heard the Omega speakers (also with Fostex drivers), but was not too enamored with their sound.
Lowthers are in another league, but they are probably out of your budget, unless you are into diy. (Check out the full range driver website for more information on diy.)
I've also heard the Omega speakers (also with Fostex drivers), but was not too enamored with their sound.
Lowthers are in another league, but they are probably out of your budget, unless you are into diy. (Check out the full range driver website for more information on diy.)