Hey all, I bought a FreeCom external HDD for my iMac, and it runs great, you can never hear it and it just plugs right into USB. However, I kinda noticed that it isn't fast enough some times for Time Machine. (Its a 5000rpm, iMac's are 7200rpm) And it's 80GB, and Ive had my iMac for 3 days and its already filled up most of it, 69GB filled up and only 11GB free space. Should I buy Time Capsule? Or should I just buy another External HDD with a higher RPM and HDD Space. -J.