okay, we'll i've been researching hard drive upgrades (damn you macrumors for getting me all interested) for the past two hours. So far i learned that the scorpia black even tho it runs at 7200, its not that much faster than the scorpia blue. I also learned that some people who installed the scorpia blue is exp. clicking sounds (im going to install it in a mid 09 umbp). what i dont understand is which one im supposed to get, and what the differences are between these two http://www.bestbuy.com/site/olspage.jsp?skuId=8679762&type=product&id=1200702542584 http://www.bestbuy.com/site/olspage.jsp?skuId=9325367&type=product&id=1218084985568 what the difference between those two are and another thing im having trouble understanding is why http://www.bestbuy.com/site/olspage.jsp?skuId=9024147&type=product&id=1218012522486 is only 50 dollars less when its a 250 gb. sorry, excuse my ignorance, first time i ever thought about doing this hahaha.