It's more a question of whether you're better off investing the money into a new psu, before you turn your pc on again. If you have the funds and a the ability to get your hands on a good psu, then I would suggest you do that before you do anything else to you system.
Find a tier 3 or better off this list(http://www.tomshardware.co.uk/forum/id-2547993/psu-tier-list.html) , before putting good money into other components, that might end up dying in a fire(ie, when your psu goes up in smoke and takes everything else in the system with it).