Jepp's SimCharts is pretty cool, actually. Not only does it give you an entire region of plates (on CD, plus paper enroute charts; 3 regions cover the continental U.S.) for only $28, it also integrates with FS2004, allowing you to practice an approach in the sim then see how accurately you tracked the approach course.
Through an extra couple of steps involving Adobe Acrobat Distiller, Photoshop and OziExplorer, I can do the same thing for actual flights and tracks downloaded from my GPS.