About a year and a half ago, I bought myself a Seagate FreeAgent Pro 320 GB External for around $100 with tax. I have been using USB this entire time, and hasn't failed me with holding my entire media collection and other stuff. But I am considering a memory upgrade, maybe to firewire, and a smaller "shell". Do you think I can get an external that doesn't need a power supply at least 500 GB? It might be pushing limits there, but I am only brainstorming. My hard drive hasn't given me any failure notices, so I am alright for now. I am also below the 100 GB mark, and my media is constantly growing. Price isn't too much of a factor, but I don't want to spend a fortune. Ideas?