First i should warn you, hair straighteners may be awesome and extremely handy, but they fry your ends and stunt hair growth. I would know i have one. I got a really good one from walmart for fourty bucks or something around that. The good hair straighteners have a different options, such as: dry,ion/steam, and most importantly steam.
Definately GHDs!! There very hot but very good, and work instantly. Very good if youre always late for work in the mornings like me. Have burnt myself on the neck before though, so be careful!! Try Johnshankey.co.uk
DEFINATELY GHD'S!!!! the best eva!! heat up in 5 seconds( literally) and i on www.ebay.co.uk i found sum for 75 pounds which u dnt hav 2 bid for! pricey but totaly worth it!! works with all types of hair!!