A 800MB file used to take 3.5 hours to download, it now takes 20 minutes. Awesome.
Our ADSL 2+ modem arrived last night, so after 4 hours of effort, we have now fully upgraded our connection. We’ve gained VOIP and wireless connectivity as well, but the firewall/NAT got a whole lot more complicated. Most things seem to be working correctly now, though. If you notice anything not working properly, please leave a comment.