looking to upgrade my TV and i'm looking at the samsung UE468000B. how much of an improvement will there be especially picture? i like the fact that it's 46" and is good with power consumption, any comments would be appreciated? also can anyone give me help with one of my B&W speakers it seems to of developed a rattle but when i press on the cross over it stops, (its not the woofer) i have checked the srews and binding post!?