I'm on the verge of replacing my older base station with the Airport Extreme Base Station but I also have the option of purchasing a 500GB Time Capsule. I wasn't looking too closely at Time Capsules, but having one more backup never hurts and the price difference between the two makes me seriously consider upgrading to the TC. So here are my questions: 1) if the HDD fails in a Time Capsule will the wireless router functionality continue to work? 2) are there any differences between the capabilities of the current Airport Extreme Base Station that are better than the 500GB Time Capsule, or are their differences purely one has a 500GB HDD and the other doesn't? I appreciate your help, thanks!