Justin, depending on what kind of wiring experience you have, you could totally put pot lights into that ceiling, however you'd probably want to put a cover up then so you have a ceiling and not just the rafters... Problem with track lighting is it will hang down, but obvioiusly you can angle it however you want which can be fun. You'd have to wire either way... Me I'd prefer a sheetrocked ceiling with pot lights I think, just looking at it.
Is that one wall just all pegboard? That's pretty slick.
What's behind the pegboard?
I figured you'd be covering the silver, I assume panel insulation? How are you going to cover that?
On the bottom of any of those shelves, you could stick lights on there that run off batteries... You'd have to turn them on/off manually one at a time, which would be a little bit of a pain.
Here's something I was thinking for that if you wanted...
Don't know if you can see this image:
It's a small "shop light" of sorts, just 5 LED's, thin, works off AA batteries, has a build-on on/off switch. i hung mine up on wire shelving just over my head on my customizing/work bench in my extra room. It lights up well enough when I need extra light and will last a long time.
Nice thing about LED's is you could find probably colored lights, or if you're really wanting a personalized color, look for glass paint and just paint white LED's any color you want. You could have a sort of dim red lighting over a Sith shelf, or a blue light over a Hoth shelf (Blue coat Han!), etc.
If you can't see the pic lmk as it might be something I have to upload a different way.