Craig, with all that power draw, your going to make the electric company rich!
If you can add another breaker, I would do as Joe said, split your devices. In a case where you already have a wired circuit, you may have other devices on it which share the load of that breaker. So a dedicated circuit would be very nice to have, two even better. If you think about it, all you have doesn't run wide open, heaters etc may run part time, so your probably not loading your circuit as much as it looks. I noticed one thing about lighting if you use electronic ballast, you will save money on your bill, watt for watt MH is Very efficient as compared to a florescent bulb of Any & all types.