Hey guys! I am considering replacing my Linksys WRTY160N routed with a dual-band router, and Airport Extreme in on the top of my list. If I connect an external harddrive to the USB port (or a NAS disk til ethernet) - will I be able to use it for time machine (or as a NAS disk in general)??? Does the Airport Extreme allow the user to control all port, open and close what is needed and not? Is there a better choice for access point than this Airport Extreme???