Yes the psu will be plenty for a while yet. But dont get fooled by the word future proof.
technology is improving at a rapid date halfway through next year intel and amd will have introduced their new chips and these current sockets will become obsolete.
intel are wose churning out new sockets every year so people have to keep upgrading their motherboards D: but amd have said the the am3+ socket will stay till 2015. But PSU's tend to last through multiple builds so they are one component you can spend extra on and it will save you money in the future. That is if you get a good one
Hope this helped