Which do you recommend? The way I see it (and am I right in saying this?) the Time Capsule is just an Airport Extreme minus the external hard drive, right? That being said, what do you recommend? Airport Extreme + other external hard drive via USB, or Time Capsule in itself? Is the Time Capsule a faster external hard drive (read/write speeds, etc.)? And what's with the one USB port? Can I use a hub to add a printer, hard drive, etc.? Lastly, how's the range on the time capsule and extreme?