I've been testing raring on my external usb hdd, doing the apt-get update, upgrade, dist-upgrade on a daily basis. I keep it cleaned out also.
Once raring has been 'fully' blessed I'm positive that I'm going to use it vs 12.10 - I really have raring configured exactly how I like it and don't really want to do a fresh install. Since I can access both 12.10 and 13.04 simultaneously I can easily copy any files saved on 12.10 (/dev/sda) to 13.04 (/dev/sdb).
I'm exploring how to 'move' 13.04 from /dev/sdb to /dev/sda. I've successfully used Remastersys to backup and restore /dev/sda; is it possible to do this to move the existing /dev/sdb installation to /dev/sda? Any other suggestions?