Alright, I'm back on the ground.
Looks like radiant barriers are a good supplement to regular fiberglass. Thanks for the informative link, Por_sha911.
I want to get the best bang for the buck with a focus on energy conservation. That said, I don't want to go overboard. If fiberglass is best, so be it.
Would I be better off investigating blown cellulose or two part spray foam for the walls? Unfortunately, I'm stuck with the 2x4 exterior walls.
Ideally, I'd like to do the work myself. Getting the work past code is NO problem for me, and I obviously need to stick with recognized products/methods. Anything I do will be approved by the inspector beforehand.