Just recently got the CS5 Production Premium, and its looking pretty crispy. However, photoshop cs5 seems to destroy my overall system performance. As in, other programs lock up, apple-tabbing locks up, etc.
I didn't have any problems with cs3/cs4, and I don't seem to have any trouble with the other CS5 applications, so I'm not sure what the hang up is.
Activity monitor doesn't show any massive spike in CPU usage, so I think it has something to do with the openGL business.
Here are some stats:
Mac OSX 10.6.4
2 x 3 GHz Quad-Core Intel Xeon
17 GB RAM
NVIDIA Quadro FX-4500 OpenGL Engine
Performance settings in PS:
Scratch disc has 94 GB available.
Let photoshop use 11476 MB (69%) memory
History States 20
Cache Levels 6
Cache title size 1024K
Enabled OpenGL Drawing