Hi,
Not sure if your display is in trouble. Can it be the Kona?
I have a Mac Pro 5.1 (12cores)
2×2.66Ghz
32GB
Radeon 5870
4 HD in Raid 5
Everything run smoothly even with the scope displayed.
For me, with over a 800 clips for one Event, the Event Library is not responsive as I thought it would be. (Thumnail view) But its another topic!