Hi, i have recently upgraded my tv to a 55" Panasonic txl55dt65b. I have a Marantz sr6003, sky hd box, panasonic blur ray and an arcam 73 cd player. My speakers are Kef iq50's as my front pair, canton cd50 centre speaker and two cd100's as my rears. My sub is a Rel T2. Accoustically I feel my system is lacking. I am unsure if my speakers need upgrading or my amp. It has been suggested that I replace my Canton speakers with B & W 683 or 684's. Or Kef Q500 or Q700's plus the relevant centres. These would replace the cantons. I love watching movies and also listening to cd's. My main musical taste is classic rock, though I listen to most types. Can anyone suggest a way to go, new speakers or an amp? I want something that will let me hear greater details than before.