Hi, I am considering an upgrade, but I am unsure if it's actually worth while or not. Basically, I originally bought a Harman Kardon BDS 877 system, and whilst it is a fantastic system for movies, I found it slightly lacking for music, and as a sound engineer of 15+ years, ended up upgrading the main L&R to B&W 603 S3's, and the centre to a B&W CC6. I have now also just ordered a larger JBL Sub 550P (10" 300W sealed box) and I'm now wondering if the BDS577 player/receiver is limiting my setup. Now as you may have noticed, there is a big Harman influence, which is due to being staff at a Harman company and getting decent discount, so I am now considering using the BDS as a 3D Bluray player and buying a Harman Kardon AVR170, as it has much a much better output (100W/ch as opposed to 65W/ch), and a much more comprehensive setup, including adjustable crossover points for the whole system which the BDS doesn't. Has anyone got any experience with the AVR170 or similar, and do you guys think that it is worth upgrading to get the best out of the B&W's? Thanks in advance!