The "+" only means that the card comes with a little extra factory overclocking. If you are comfortable with your own overclocking, then there is no need to go for the FTW+. I would get the FTW over the Superclocked because it uses a more robust custom PCB and components. With that, I would go for the FTW "Signature 2" model, which has custom cooling that will be quieter and cooler.
Thank you! I realized that i wont be needing the 4 gb of ram for the FTW so i decided ill save some money and go with the signature 2