Originally Posted by maritimesbob
Really thinking over an XFCE distro of some kind.
Just to be nitpicky... Xfce is a widow manager that comes with a distribution (as is KDE and others), there is kinda-sort no such thing as an Xfce distribution per se.
With your hardware (particularly the limited RAM) you really want to use Xfce as your window manager simply because it's not bloated and doesn't eat resources like a starved wolf pack with a fresh kill and is a clean, efficient interface with a nice look and feel.
Go get a couple of RAM sticks (they really are dirt cheap nowadays) and bring that box up to 8G or so and you'll be a lot happier with the result.
Hope this helps some.