The stock HD that's in my MacBook which is a TOSHIBA MK2555GSXF 250GB 5400 Does anyone know anything about this drive? Benchmarks compared to the Hitachi below. Also power consumption compared to the Hitachi? Or this Hitachi 5K500.B 250GB 5400 http://www.newegg.com/Product/Product.aspx?Item=N82E16822145255 Also, how reliable is this drive? Originally I was going to get the 320GB Hitachi, but then I've read that the single platter 250GB drives out perform the 320GB's. I was also going to get a 7200 HD but then decided against it because I want to keep heat/power consumption to a minimum. I'm looking for... (greatest to least)... Low heat Low power consumption High Speed Quite Any help would be greatly appreciated.