Holy crap, Dennis! I gotta admit that from earlier descriptions, I couldn't visualize what you were intending to do. Even after you posted the pics of the CD units in place, though impressed by your [envy]carpentry skills[/envy], I wasn't all that impressed by the look, and couldn't figure out where the hell you were gonna put the DVD rack. But seeing, in that photo, how the DVD rack so nicely balances the CD racks, and imagining the how the oak ply on the wall, and oak trim around the window to the puter room will tie everything together, I am FLOORED by how good it's all going to look. I profoundly HATE this man!
In order to reach the top shelves, what you need to add now is one of those library ladders that, at the top of the ladder, runs along a track on the top of the cabinet, and has wheels on the bottom so you can slide it to whichever cabinet you need. Nah! For the few times you'd need to get to the top shelves, that might just be overkill.
