I am in the market for a new router and am trying to make up my mind. Looking at either a 2TB Time Capsule or a AirPort Extreme w/ 2TB External drive. What are the pros and cons of each except price, i just want to know whats going to be best. I am looking for using Time Machine wirelessly and backing up my iPad and iPhone to it as well and accessing my files remotely. My biggest worry is if the hard drive in the time capsule fails. Can it be replaced with any drive or does it have to be a special hard drive that works with the Time Capsule. I have also Thought about doing NAS so i can use RAID so protect my files. I have large amounts of pictures, videos, and music that must be backed up. Thank you in advance for any and all suggestions.