Hi, I'm looking to set up an internet connection in my office. The only data transmission I will be doing is medical insurance claim submission (small files, no need for broadband). That said, the line needs to be extremely secure. I already have firewall software installed on the computer that will be doing the transmitting, would getting a router with a built-in firewall be overkill? (The line will be active for 4 hours in the morning and about 4 hours in the afternoon, so it will never be left on for very long.) Thanks for your advice!