Car audio system stereo? specs? in-dash decks?

billn

New member
84 watts peak power; 16 watts RMS x 4 channels

VS

50 watts peak power (20 watts RMS) x 4 channels

whats the difference between these to "in-dash decks"?
i have standard stock speakers in my car, but i could up grade them later. so which one is better?

http://www.bestbuy.com/site/olspage.jsp?skuId=8496488&type=product&id=1186004537907

http://www.bestbuy.com/site/olspage.jsp?skuId=8679753&type=product&id=1197678618681
 
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