What PSU for GTX 670 SLi

[Rhaos]

Hi Guys,

Looking to add a second GTX 670 to my current setup and Sli it with the exisiting EVGA 670 I currently have.

Could someone please recommend a decent quiet PSU preferably modular that would suit? Also would like it future proof as I have plans to eventually grab a new shiny Geforce from the new range thats out next year.

Cheers

 

[Rhaos]

Would 750w do? Spotted a nice looking modular EVGA going under £100.

Just want to make sure that whatever I buy will work with the higher end next gen Nvidia Cards and I dont need to upgrade afterwards.