Matching components to Speakers??

Choose your speakers and other components by listening, not by specifications! You are far more likely to blow a speaker with an underpowered amp that breaks up at at high volume than with a more powerful amp. Unless you expect to drive the amp at maximum levels through all the channels simultaneously (not likely to happen with any music or soundtrack, not to mention that the amp probably won't drive all the channels at 200 Watts simulataneously), there shouldn't be a problem using a 100-150 Watt rated speaker with a 200 Watt amp. Under any circumstance, surround tracks are not usually recorded at a particularly high level. Also realize that even when playing fairly loud, the amp is probably putting out only a few watts. Just pick out what sounds the best with you equipment.

With all due respect to Thsalmon, specs can narrow down your choices and save you from damaging your equipment. Ideally all your channels would be as identical as possible. Besides power, consider the impedance load the speakers will present to the amplifier. Other considerations include power outlets, placement, heat dissipation, compatability with preceding components (sound, ground, sensitivity, impedance, inputs and outputs), desired volume, and cables. Caveat, I'm not a big proponent of surround sound.

I agree, you can use the specs to narrow the choices. Five (or more) identical speakers would be the ideal for surround, but is isn't usually a practical solution. Two speakers is enough for me too!.