Which GHD's do you recommend?

My hair's medium length, quite thick, and I want to buy some GHD's. But I don't know which ones to get, a limited edition normal sized plate, or a Salon Styler. I'm thinking of buying the Rare styler, or whatever comes out in the Summer, but I don't know if it'll straighten my hair as well as the Salon Stylers? What do you recommend?