It's difficult to tell without prices and model numbers.
If you want to reduce cost at the same performance level though, I'd definitely go with the Corsair TX650 over your current PSU for about $200 less.
I'd trade out the OCZ drive for an Intel 520 Cherryville 120GB SSD, which runs around $170 and is big value for the money. I've always had issues with OCZ stuff. If you go with OCZ make sure it's a Vertex unit and not an Agility unit if performance is your goal.
You might also consider switching to a Z68 motherboard for a bit less. The only real diffeence is native USB 3.0 support, which isn't really worth the extra dough.