You should not choose speakers based on the receiver you have. You should choose them based on sound quality, power handling, and sensitivity. You basically want good sound quality, high power handling, and high sensitivity, no matter what your receiver.You should not look at the power handling of speakers relative to the receiver!!!
It doesn't matter if it is higher or lower than what you receiver can put out, as long as it is as high as possible.
A mistake in thinking that people make goes something like this:
Low powered amps clip. Clipping damages speakers. Therefore, it is always better to have the amp wattage greater than the speaker wattage to avoid clipping and speaker damage.
Here is why this is wrong
Low powered amps only clip because people turn them up too loud. People turn up low powered amps too loud because they want a volume level that their amp can not deliver. Assuming an equal sensitivity, no matter what speaker is being used, the maximum volume will always be the same. Because of this, no matter what speaker is being used (assuming equal sensitivity) people will always turn the low powered amp up to the point of clipping. Speakers with a lower power handling will be more easily damaged by this than speakers with a higher power handling, so therefore it is better to get speakers with a greater power handling, even if this is greater than the wattage of the receiver!
Here is the trick: the sensitivity of speakers is not always the same. Speakers with a lower sensitivity tend to have higher power handling (it takes more power to move the cone, so the speaker can handle more wattage), and speakers with a higher sensitivity tend to have lower power handling (1 watt really pushes the speaker cone hard, so 100 watts is likely to push it too hard). So, lets say you get a speaker with very high sensitivity. The low powered amp would be able to drive it loud enough with the volume knob only part way turned, so the amp wouldn't clip. The power handling would also be low, so other people would instantly think, "it hasn't blown because the power handling of the speaker is lower than the receiver," which is wrong. It is the fact that you have kept the volume knob low which has saved the speaker from blowing, and that is a result of the high sensitivity, not the low power rating. If you were to turn the volume knob all the way up (as you would with a speaker with higher power handling, but lower sensitivity) the speaker would blow.
When looking for speakers for a low powered amp, sensitivity
is more important than power handing. This way it will get to the volume you like, but won't tempt you to turn the amp up too loud.
It is not clipping which damages speakers, it is the volume knob being too set too high.
EDIT: The best way too choose speakers for a low powered amp is to listen to speakers that sound good and get much louder than you will ever need them to get, and then choose the speakers with the highest sensitivity, and from those (if you have a choice) pick the speakers with the highest power handling. After that, NEVER turn the amp up past a particular volume which you have determined is much lower than the volume you auditioned them at. This will give you speakers that will be loud enough, but less likely to blow.
For a high powered amp, sensitivity is not as important. Assuming an infinitely high powered amp, you would choose speakers by narrowing it down to speakers that sound excellent, narrowing it down further to the speakers with the highest power handling, and then (if you have a choice) choosing the speakers with the highest sensitivity. This will give you speakers that sound great, can get very loud, and are very unlikely to blow.
If you can't audition, you will be sacrificing sound quality. In this case, just look first for speakers that have high sensitivity ratings, and then choose among those by the power handling.