A friend just came to me with a very odd question, that I honestly had no answer to, so here I am asking you smart folks: He is building a media server/HTPC/gaming machine that will be hooked up in his living room to his HDTV running 24/7(the computer, not the TV). The machine is a pretty standard Micro-ATX build, nothing major. However, he tends to think a little outside of the box sometimes, and like to be unigue in some way when building machines. So he has two options for the HDD setup: He can buy one 7200RPM 1TB Seagate Drive: http://www.newegg.com/Product/Product.aspx?Item=N82E16822148373 or He can buy two 5400RPM 500GB Seagate Drives and put them in RAID 0: http://www.newegg.com/Product/Product.aspx?Item=N82E16822148371 Price isn't a factor, but he can only pick from one of those options. Now his questions to me, which are my questions to you, are: 1.) Which one would give better transfer rates?(I'm not really sure one this one. Would the RAID make the 5400RPM drives fast enough to best the single 7200RPM drive?) 2.) Which would have better latencies?(I'm guessing the 7200RPM Drive, as the RAID wouldn't really help the slower latencies.) 3.) Which would produce more heat?(I'm guessing the 7200RPM.) 4.) Which would use more power?(I'm guessing the 7200RPM here also.) 5.) If the 5400RPM RAID 0 combo would be slower, would it really be noticeable? 6.) Overall, which do you think would be better?