I'm doing up my house and wanted to put in-ceiling speakers throughout. I managed to get my hands on a really good lot deal on 14 speakers, a mix of Monitor Audio C265-LCR and C265 speakers. These have recently been replaced by trim less versions so the discount was substantial. I have enough C265LCR speakers for my 5.1 cinema room but have seen that there is also a C265-FX in their lineup which is meant for the back surround channels. Will I really hear the difference between 3xC265-LCR with 2xC265-FX instead of 5xC265LCR? Should I be looking around for any C265-fx now before they are all gone? I have a Denon AVR3312 as the AV Receiver. Thanks in advance for your help.