Really though, if you have the option to go wired you should do it. Wireless is just another hoop your network has to jump through, another step that can get bogged down or go wrong. Your wireless is not going to be any faster than your router can push it up into the air, and your router is connected via the same Ethernet connection as your Mac would be, so your wireless can never be faster than a hard line into your computer.
Additionally... why worry about wireless security if you don't have to? Why push your personal data up into the air if you don't need to?