canada16:See I must not really be that much of a hi-fi nut.
I have a Dali Ikon centre with diamond 9.1, and I cant hear a sound difference.
I tried MS on the front, Q accustics as well and they all sounded ok, so maybe My untrained ears dont care about warm and bright
Yes, but then the MCACC system in your Pioneer amp, like the automatic calibration in most modern AV amplification, applies equalisation in an effort to make all speakers conform to a theoretical 'ideal' sound. For that reason it will tend to disguise tonal inconsistencies between the speakers in your system, although its real function is to compensate for differences in placement, etc..
And to anticipate the next question, yes, that does mean you could use speakers of different brands on each channel if you really wanted to - and indeed you do have something of a mish-mash of speakers in your current system - but using similarly-voiced speakers all round, or at least across the front three channels, will mean less equalisation will be needed, which can only be a good thing.