If you already have your own PSU, then it's purly down to which one looks best in YOUR opinion. As long as it has enough drive bays, sockets on the front and the cooling fans you require, just take your pick. I don't think any of then are in particalar extra cooling, not in the price range you're looking in anyway but they are all there to do roughly the same job.
Unless someone else has something to say on the matter???? Await more posts maybe !!!