I am getting a new HDTV soon, and buying a system to go with it. But I don't have too much money right now. So, I was only going to get the fronts, a center, and a sub, and by the rears, and surrounds at a later date. But I was talking to a friend and he said that you should get everything at the same time, because if I buy the rear, and surrounds, that they will have tone differences. Is that right? Oh, and he also said that you can't get a different brand of speakers for the rear, or surround, because of the same reason. Is that also right?
I disagree with others who have posted—to a degree. It is certainly true that the fronts matching is far, far more important than the rears matching, but I use identical speakers for all channels (excluding LFE/subwoofer, obviously), and I will NEVER go back to using lessor speakers for the rear/surround. But, if I were on a tight budget, I would just buy the fronts and hope that I could find matching rear/surround speakers later. Really, it is far less important that the rear match than that the front match. But I think it is wrong to say that it makes NO difference.
I also like using an IDENTICAL speaker for the center channel, instead of one that is supposedly "voice matched", though I do realize that for some people, that approach may not be feasible due to various constraints. An identical speaker is absolutely voice matched, but a "voice matched" speaker typically does not sound exactly like the main speakers. Still, it usually is close enough for most people.
I do agree with mike c's order of importance for speakers:
1) Main speakers
2) Subwoofer
3) Center speaker
4) Surrounds
5) Rear surrounds
In other words, I would rather listen to a system with just main speakers and a subwoofer than just main speakers and anything else (assuming that the main speakers do not have unusually good bass, like flat response down to 15 Hz, in which case a subwoofer would be unnecessary). And next, I would want a center speaker (ideally, the same as the main speakers), etc.