I'm considering upgrading my current speaker system and am curious about the effects of piece by piece upgrading on the overall sound of the system.

I currently have the Energy Take 5 system with ES-10 sub connected to a Denon AVR-2700. Cabinet size was a major consideration for the speakers initially, due to my better half. The take 5s have been exceptional considering their size, but I think I've sold my wife a little on slightly larger speakers.

I'm considering various models, including the Energy C-1, Axiom M2i or M3ti and Paradigm Titans.

My main concern is whether the overall sound will suffer if I just upgrade the front left & right speakers for a few months and then do the same with the center and surrounds over the next several months.

Any input regarding brand/model selection is welcome as well.

EDIT: I listen to a mix of HT and music. Probably 60% HT and 40% music.