Help finding a PSU

I'm looking to get a different power supply and I wanted to get some opinions on which one would be best for my setup right now.

Here's the speccy: http://speccy.piriform.com/results/u5P8EOxjQJBwX5iaDtXrNZM

What do you guys think? I currently have a 650W psu but am looking to get a 750W, but I'm not sure if it's needed or if buying a psu with more wattage than I need will be bad for the computer or not.

My current power supply is this: EVGA 120-G1-0650-XR GOLD 650W Fully Modular Continuous Power Supply

I've been having a freezing problem with my computer that after literal months of me trying to figure it out on this forum, we didn't get any solutions. During the process, I was told that this one has some problems and that this could be causing the freezing, so I'm just biting the bullet and getting a new one to see if that fixes the problem.

I wasn't planning to change anything that's already in there, but I also want to add some Bluetooth capabilities to it sometime soon.