I usually stick to 40's, light enough to knock out 10-12 nice, slow and controlled, heavy enough to make it burn. I tend to go a bit lighter on any lateral movement since it's so easy to f**k something up. Better to be safe than sorry. You can go heavy on DB presses.
But like it's already been said, weight doesn't matter. It's what works for you. When you show off is when you get hurt.