no doubt it is a cheap psu, but he has a cheap budget. the 750tx cost me 120 bucks canadian, thats 3x the price of that, but that one will work just as well for the time being. it might not last 5-7 years like ours will but it CAN last a couple years or else they would never sell.
just a bigger chance of it being DOA or not being able to handle as much as it says etc. but i think for a rig like his which isn't a monster you don't need a monster psu for a monster price.
however i definitely am a fan of the corsair psu's. these things are bullet proof