"Best" speakers new/used under $3,000?

I am using a Musical Fidelity A3cr power amp, a Jolida Fusion pre-amp, and a Jolida tube cd player. I just bought the Fusion and love it. My speakers are B&W 640s (which I've owned for 15 years). I use a Klipsch dual 15" powered subwoofer as well. As much as I love my system, the speakers must be outdated, so I'm looking to upgrade. I have a $3,000 limit for speakers and would appreciate any opinions. I've considered B&W used 800 Matrix speakers as I like the brand, but am open to anything. Thanks.