RE: Shoot coming up in a month or two....
To be honest, your not going to see much difference between 20-30 yards. The differences are going to be noticable out past 35 yards or so.
The 30x Pro's will come with pin nocks and bushings. I'd suggest that if you will be shooting goldtips for a while, to buy yourself a 100 pack of the nocks and change them often......if they don't feel like they are snapping on the string right......or if you whack them good shooting groups and can see any damage at all......change them. I typically will go through a 100 pack of these things every summer.