Hello! I have a 1TB Time Capsule from 2010 (802.11n) that's worked great for me. I got a new MacBook Pro retina with 802.11ac, and I'm wondering if the newest 2TB Time Capsule with 802.11ac would be a lot faster to back up via Time Machine and to store files? I've also heard reports that these new models have an audible fan. I don't hear any noise from my current Time Capsule, but is the new one significantly louder? Thanks!