I like he having the extra wattage.
story 9 years ago when I was in 10 grade. my teachers computer, custom built by the school. blew up in class because they put the wrong psu in it. this was a graphic design class.
he ended sueing the School district for put his life in danger.
Could have gotten the TX750 V2 Corsair PSU for $90 cheaper and still have enough power for two GTX 670s in SLI OCed and the CPU OCed as well. That motherboard is overkill. Unless you know you will need every extra feature it offers, get an ASRock Extreme4 Gen3 Z77.
Exactly what azeem said and why on earth would you want more wattage? It's going to make you pay more and it's just really dumb to get way more than you need. Calculate the max wattage your computer can reach even overclocked then aim for that, but you shouldn't need anymore than 750w or so. If your computers max wattage level is 700 watts for example, then going for a 1000w power supply is incredibly stupid and a complete waist of money that can be used towards something else. Also I highly doubt the PSU was at fault for the computer exploding, I'm pretty sure if you don't have enough wattage or a bad PSU then your computer will just shut off, explosions are super rare and usually caused by over heating and not good enough cooling.