I had my computer get hit by lightning, im not sure if its the same as your problem but after inspection of all the parts i found that a chip had exploded on the motherboard (sound chip). I bought a new Mobo and problem solved.
If you live near a best buy or computer store you should be able to take your PSU in and they will test it for you.
hopefully the surge didn't ruin more then PSU or mobo, but it could have taken out GPU, RAM, CPU or hard drives. Test out each part to see whats working and then replace whats not.
Also... how do you have Corsair NZXT case? aren't those two different competing brands?