Hey I'm thinking of getting the 500gb Time Capsule for my new iMac's backups. Should I use a usb or firewire cable for first time backup, then wireless for the scheduled backups after that? An alternative I've also thought about is just getting the airport extreme (for the wireless access and router) and use my Western Digital external HD. That would save me a few bucks, right? Any opinions on the subject? Other solutions? Sorry for the newbie questions, but I'm really a Mac virgin...You guys have been pretty helpful so far, though. Thanks in advance.