Hi, I've just got a new Yamaha RX-V640RDS Home Cinema Receiver, and I need to replace my old front left and right speakers, which are B&W 601 s2's The rest of my speakers are B&W also. I was thinking about a set of B&W 603 s3's, as my old speakers lack bass power & sound alittle flat with music. What do you think? I have around £600 to spend. Thanks for any help.