I always run Michelin PR4s (or whatever PR
version is current).
I always change and balance myself, just balancing the wheel-tire assembly on its axle, suspended over a couple 5-gallon pails. IMHO, that works surprisingly well, and the price is right.
Balance matters, I think, but just my opinion, and maybe only if a lot of time is going to be spent at 80 MPH+ (indicated). (My bike spends a fair amount of time there).
Even with Michelins, I find wheel-tire assemblies always out of balance. The problem is mostly in the wheel, in my experience (I've played around with balancing the wheel only (no tire), and it takes quite a bit of weight just to balance the wheel). On the plus side, little, if any, extra weight is then required to balance the wheel-tire assemblies.
Believe it or not, I'd noticed that, when I'd turn loose, completely, of the handlebars of my bike, the head would shake some. At that time all wheel weights were on one side of the wheel (yeah, dumb, but I didn't think it would matter, being so close to the centerline of the bike). At next tire change I tried to put the same number of weights on both sides of the wheel. Made a big difference in "head shake" with hands off the bars.
Live and learn...