I'm from Argentina, I'm using in my home laptop(core i3, 4gb ram) ubuntu 12.04 with unity (I hate it), and in my computer laptop(core i5, 4gb ram) Fedora 16 with gnome shell.
I'm php developer, I use netbeans (java), chromium (with 10 or more tabs and extensions), skype, pidgin, console, etc.
So , with Ubuntu I have continuous freezing (sometimes, excesive ram usage), for example copying files, working on netbeans, etc, with ubuntu 11.10 was the same ... in my work laptop with ubuntu 11.10 I had the same problem, but when I installed Fedora all the problems go out ... and I'm very happy with Fedora.
The problem with Fedora is updates ... on rolling release updates, so, I need to download and install new version.
Can you tellme your experience with another distros in comparison with sabayon ?
can sabayon will be my salvation ?

