pc for newbie

hello, im planning on building an A330/A320 cockpit and starting from scratch, i plan having 1 seat and maybe in future upgrading to a full size cockpit.
Im currently running fs9 on my laptop 2.53 intel core 2 duo, with a 20'' outside view. The fps is decent but at times i get stuttering and freezes, plus my laptop heats up.
now back to my topic:
I havent bought a comp in ages and all the names now dont sound familiar. Im planning on having 1 pc and multiple displays for fs9. Im looking for a pc in the $500 area is that possible?
Any suggestions for a cpu/ video card? and websites to buy

Thanks