The Pioneer will do a fine job. It is preferable to have more power than needed, too little amplifier juice will result in clipping. The amp runs out of steam, it clips off the waveform, causing the speaker to start and stop constantly. While the speaker is stopped from the clipping, the amp is dumping around 10x it's normal output (in the form of distortion) into the speaker's voice coil. The voice coil is near the end of it's travel, placing it partially out of the gap which it relies on to shed the heat. This can lead to melt down.
Always better to have more amp than you need, within reason. The SC-LX85 is within reason. :T
Always better to have more amp than you need, within reason. The SC-LX85 is within reason. :T