I have also used the Banana Boat for my head-works great. I also use Pantene UV protectant (had UV filters in it) leave in conditioner as it helps my hair stay healthy and not get dry or discolored by sun, pool, etc.
I use PureOlogy ColourMax spray. It was recommended by my stylist because it has UVA and UVB protection. It doesn't have an SPF that I can find though, but I'm fair skinned, blonde, and burn easily and it seems to work for me.