I'm not a fan of Ultra power supplies. I'd stick to a better brand like Corsair or Antec. Corsair 750TX would be my top choice. The Hitachi 1TB is okay, though doesn't have exactly stellar performance. If you can get a Samsung F3 1TB, or Seagate 7200.12 1TB, those would be better choices. As for getting a hard drive cooler, they were kind of useful when hard drives ran really hot and case design didn't incorporate hard drive air cooling, but both are a lot better right now. Actually the Hitachi Deskstar is one of the few drives that you'd actually want to put a cooler on since they are generally unnecessary.
Hitachi makes okay drives, but they aren't exactly a go-to for performance. Over the past year they've been lagging behind the competition for 3.5" drives, but still do okay in 2.5" drives. They are getting newer drives to market so brand new Hitachi's may be better, but that 7K1000.B is probably over a year old.