My home setup is Monitor Audio RS5 (x4: Left, Right and 2 rears), RSLCR (centre) and RSW12 (sub) connected to a Denon 1910. I use this for stereo audio, stereo & 5.1 TV and 5.1 cinema sound - Basically, everthing. We listen to rock, ska, electro, pop, through CD, DAB, Spotify and streamed MP3 and FLAC. I recently moved to a larger open plan house, which has much more space to fill (15 metres long by 5 metres wide) so I'm considering upgrading the front left and right pair. My current considerations are 2nd hand RS6, RS8 or RX6. My thoughts currently are the RS6 would slot straight in without adjusting anything else but should I aim a little higher? Possibly go for RS8, RX6 or RX8? The questions I'd like some help answering are: 1) Would The RSLCR centre speaker need upgrading if I changed to RX6 or RX8 because they are tonally different due to the change in tweeters (etc)? 2) Would the Denon 1910 do the RS8 or RX8 justice or would it also need upgrading? Once I've decided on the fronts I'm then going to try using the replaced RS5 pair as surrounds in a 7.1 configuration, if the wife will allow 6 floorstanders in the house at once!