Best place to store iTunes library?
I'm loving my Apple TV 2. However, I have one snag which is really more of an issue of best system set-up. I have a growing amount of TV and film media on my iMac and am increasingly getting used to the idea of having all my media at home then being transferred to my iPhone for use on the move and in my car and at home streamed to my Hi-fi and Apple TV. However, it seems that whenever my iMac goes to sleep my Apple TV cannot access my library - it can't wake it from sleep. I've considered using my Time Capsule to store my iTunes library to then be accessed by all systems, but I like the fact that at present my Library is stored in two places - my iMac and backed up to Time Capsule. How do you suggest I set up my home so my library is 'always on' (without keeping my computer awake and wasting energy) whilst ensuring as many copies/backups are available as possible and that all systems (including my iPhone) are kept up to date?