Well, WD Black 1tb drive is great choice - its rock solid one of the first in any comparable benchmarks. Samsung F1 are very close, but I'd still get the wd.
Any HD is basically have 50/50 chance to live throght the first month, and If didn't failed - you got pretty good chance to have this drive for a very long time.
You'll want to make sure the drive is always cool, hot running drive = slower speed and shorter lifespan.
The hidden bonus with WD Black 1T - its easy to apply TLER patch, basically turning Black drive into Raid series one - basically optimizing it to use with RAID arrays.
Looks like 5xxx is the way to go, but you don't really need to wait for 53xx as 5750 costs around $130.
Mozart is a pretty big case and you wont have huge issues cooling this card.
But, I think for the money ION/XBMC or Boxee system will beat your setup on value any day