Hi guys, I need a 2.5" drive for my Popcorn Hour Media Player. This drive will be used for ext3 (Linux) file system and only for watching my backed-up Blu-ray movies (.mkv) I currently have Seagate Green at 5900 (16MB or 32MB cache), I'm not sure.. This disk is too loud when watching movies with low volume, so I need a quiet and cool disk. The speed shouldn't make a difference for my needs, but I'm wondering is there a huge difference between 8MB and 16MB cache sizes, especially for this purpose? HDD Mobile SEAGATE Momentus 5400.6 (2.5",500GB,8MB,Serial ATA II-300) HDD Mobile SEAGATE Momentus 7200.4 (2.5",500GB,16MB,Serial ATA II-300) According to this review, Seagate Momentus 7200.4 is more silent than his slower brother at 5400.6 ??? http://www.silentpcreview.com/article992-page1.html The price difference between these two models is around $7.