I would like a simple Linux system
I'm wanting to build a system to run preferably 2 versions of Linux. I don't really need anything special right now, probably the main things I would like in the system currently would be a nominally decent overall spec with enough storage to let me try out various things/apps in Linux. I have never built a system before though. I would like the system to to be easily upgradeable so that when I become more familiar with Linux I can migrate over to it and upgrade it to make it my primary PC over my current XP sys. Does anyone have any suggestions for a basic build, preferably no more than about $500? I've looked and I feel a little overwhelmed, especially since I am not overly sure what is necessary for a good Linux box. Any suggestions would be apppriciated.