iTunes overkill
I've been working on my iTunes back-end for a little while. External MyBook drives have given way to a brief dalliance with Windows Home Server. The home of the media is now a Drobo, which is loaded with three 1.5TB drives (from the WHS box) and a 2.0TB drive - slightly under 4TB useable space if memory serves, Drobo claims the largest of the drives plus a bit of space off each of the data drives for data protection. It's about half full, but I've been working on acquiring content for awhile.
Before you ask, let me tell you. There's an oldish G4 Mac Mini whose sole purpose in life is to house the iTunes library - it's got the Drobo connected to it. I'm currently at SD in my house, but am hopeful that the HDTV will come along this year. My kids (7 and 10) have the DVD player and Dish Network system down pat but I'm looking to secure the extensive DVD library somewhat from further damage by the aforementioned 7 and 10 year olds, never mind my various Season Passes and whatnot I've gotten through iTunes. iTunes/Front Row/Apple TV offers that simple menu-based access, and now the back-end is in place. Next purchase for the system will be an HDTV, hopefully followed quickly by an Apple TV since the G4 Mini is nowhere near capable of actually playing HD content but can serve it up well enough.