You might try looking for some used Soliloquy 5.0s with the Creek integrated. The 5.0s are monitors but pack quite a punch for their size/price, they absolutely disappear in the room and throw off a huge 3D soundstage with excellent imaging and dynamic presence. It'll be tough to find floorstanders in your price range that don't have some significant flaws(i.e. boomy bass, bright treble, limited soundstage, etc.). Best of luck.
Tim
Tim