I have a RedHat Linux machine that I use to host subversion and run a number of CAD tools on. RedHat is now so out-of-date that it refuses to update Firefox. So I'd like to upgrade to Ubuntu. I run Ubuntu on my laptop and remote access into the Redhat machine when out-of-towm. I run the Redhat machine headless and always remote access it from a Windows machine (ugh) in my office.
Which is the correct version of Ubuntu to load to replace RedHat for my application. I'm by no way a Linux expert but can usually find my way around with a few hints!