Hi all I wonder if any trader-cum-hardware guru would care to compare a 15k rpm Seagate Cheetah SAS drive to a 10k rpm WD VelociRaptor SATA drive for a computer used primarily for trading and charting on a 24/7 basis. Specifically, it will receive real-time data from Interactive Brokers for charting via TradeStation 2000i/Metaserver. Three issues: (1) Given the nature of the primary task and the large number of read/write operations from/to the disk, is the Cheetah likely to be the more reliable drive for such purpose? (2) Is the Cheetah likely to be noticeably noiser than the VelociRaptor if the computer is placed near the user, all other things being equal? (3) Could the extra heat generated by the 15k rpm drive pose a real problem if the room hosting the computer doesn't have round-the-clock air conditioning? Overall, are there any practical advantages in choosing a 15k rpm Cheetah over a VelociRaptor for the described trading/charting purposes? Your feedback, please, and thanks in advance.