I am considering a Time Capsule. I am currently using a linksys e1000 and I'm not thrilled with its range. I have heard the time capsule has great range and the benefit of the external drive is great; as opposed to just getting an Airport Extreme Base Station (am I correct in that choice?). The apple store has refurbished previous generation, 1TB for $179 vs refurbished current generation, 1TB for $219. Why should I pay the extra 40 bucks? Are they more stable? Better signal? Thanks.