I've had my R3610 for over a year now and have been really happy with it, however I recently setup a home server so no longer have any need of storage space on the Revo. I am toying with the idea of swapping the existing seagate 5400 RPM 500GB drive for a Western Digital Scorpio Black 160GB 7200RPM. Would the speed improvement be worth the £35 outlay mius what ever I can get back for my existing hard drive on the members market?