Got it out on the highway last night, & the vibration is definitely still there. It didn't seem quite as bad as before, but I guess that's partially due to the balance previously being off a little. I went ahead & ordered a new wheel today. Now I have to wait for it to be custom built. That's almost $100 I wasn't expecting to spend!
I've also decided to ditch the plan to replace my tailgate light bar/strip, while keeping the tinted tails. I just didn't trust the fact that most of them are hit/miss on quality. I got a crappy one last time, & I don't want to get stuck with another. So I plan to order a new set of taillights & have them painted in this fashion:
taillights 1 by
likaroc13, on Flickr
taillights 2 by
likaroc13, on Flickr