Searching through google and various ubuntu forums I find two methods advocated to upgrade from edgy to fiesty.
One the "official" method says to simply click the "upgrade" button in the package manager. The other method is to use either "apt-get dist-upgrade" or "aptitude dist-upgrade" from the command line. After changing all instances of edgy to fiesty in the source.list file and commenting out third party repositories.

I have used aptitude since I have installed edgy for updating and installing kernels and packages. I have heard it's best to be consistent and keep using aptitude vs apt-get or the front-end synaptic.

Should I just click the "upgrade" button. Or should I stick with aptitude to upgrade to Fiesty. Or does it matter?

I've been using Fedora for years and have never upgraded to a new distro version. To problematic with Fedora.

Any input would be appreciated.

I would use:
Check the output of the dist-upgrade carefully to make sure that anything that is being removed is also being installed or an equivalent is being installed. Also, any errors that occur when installing the packages will help you track down problems. Using the upgrade manager you often don't get these error messages.

--Ian

Thanks.I've already ordered the Fiesty live/install cd. I'm going to try to upgrade to Fiesty via aptitude first. And no success or serious errors I'm just going to clean install it through the cd.

So should I comment out any third party repositories?
Here's a copy of my sources.list file.

# Automatically generated sources.list
# http://www.ubuntu-nl.org/source-o-matic/
#
# If you get GPG errors with this sources.list, locate the GPG key in this file
# and run these commands (where KEY is replaced with that key)
#
# gpg --keyserver hkp://subkeys.pgp.net --recv-keys KEY
# gpg --export --armor KEY | sudo apt-key add -

# Ubuntu supported packages
# GPG key: 437D05B5
deb http://us.archive.ubuntu.com/ubuntu/ edgy main restricted
deb http://us.archive.ubuntu.com/ubuntu/ edgy-updates main restricted
deb http://security.ubuntu.com/ubuntu edgy-security main restricted

# Ubuntu community supported packages
# GPG key: 437D05B5
deb http://us.archive.ubuntu.com/ubuntu/ edgy universe multiverse
deb http://us.archive.ubuntu.com/ubuntu/ edgy-updates universe multiverse
deb http://security.ubuntu.com/ubuntu edgy-security universe multiverse

# Ubuntu backports project
# GPG key: 437D05B5
deb http://us.archive.ubuntu.com/ubuntu/ edgy-backports main restricted universe multiverse

# Medibuntu multimedia packages
# GPG key: 0C5A2783
deb http://medibuntu.sos-sts.com/repo/ edgy free non-free

# Canonical Commercial packages
# GPG key: 437D05B5
deb http://archive.canonical.com edgy-commercial main


Should I comment out just Medibuntu and Canonical?
What about Ubuntu backports?

I used:
gksudo "update-manager -c -d"
in the terminal, and it worked OK.

I have always used:
because the upgrade has not always shown up when I System>Administration>Update Manager.