Not sure about the wall. All I have in the rig is a 500gb hdd, anthlon II 270 cpu, 4gb stick of ram and the 2 gpus.

After the psu buckled I replaced it with a 750W psu and its running fine but I was hoping on eventually adding another card like  R9 280x or 290x.

I know i'll need a new psu for it but don't know which one will be best. Any suggestions on brands?