I would seriously think about getting the GHD. I have extremely frizzy curly hair and when i use my GHD i only need to re-straighten it once a week after i wash my hair.

I have this product called Flat Iron Protection Shine Mist. It helps stop your hair from getting damaged from the straightener. I got it from Price Attack. It comes in a small pink spray bottle.

A good anti Frizz product that i use is Nak bio-marine complex repl-ends spray, also from Price Attack. I use on both myself and DD and it works a treat.