Sponger:
Choosing home theater components based solely on what's on sale at the moment is a dangerous approach that could cause much grief.
Timbre matching does not mean merely that you buy speakers from the same manufacturer, it means that the speakers you buy are specifically designed to work together as an integrated system in your home theater.
It would help you to spend time learning about home theater before your purchase. There's lots of information (too much in fact, and much of it not entirely consistent or clear), but here's one starting point:
http://www.goodsound.com/guide/See the links at the bottom of the page, as well as equipment recommendations for the last few years.
Les