Slight vibration sometimes

Good afternoon everybody,

I got my truck lifted, bilstein 5100's, OME 888s, AAL, and put some 265/75r16 wildpeaks. The guys at the shop said that the alignment was dead on how it should be, Ive heard you need more caster when lifting but Im pretty sure they aligned it to factory specs. It also got balanced at the same time. I got the brakes done at around 50K miles, its about 65K right now. Any ways, I first notice that the rear was bouncing around quite a bit, but that settled after a few hundred miles, Im guessing that that was the AAL. Now when accelerating I feel a bit of a vibration between 45-60mph. I dont always feel it, but when I do its like "woah, whats that?" I felt a similar but much worse vibration when I got into a fender bender, it turned out that the rim was damaged and needed to be replaced. Could it be that my rim is damaged or that the alignment is off? I did just take it into the dealership for service yesterday.