Anything around 500-600W should do the trick. Maybe more if you might add another 760 for SLI in the future. Don't skimp on the price though, go for a decent brand. You don't want to feed your nice components with the possibility of dangerous power.
The GTX760 has a minimum PSU req. of 500 watts with min. of 30amps of +12V current
ALL of the PSU's everyone has listed here will meet that requirement.
Enjoy your rig. Hope I have helped.