I haven't heard much about that zalcman.. if you decide to buy new though, I'd recommend a venomous X, TRUE 120 or nh-d14, those are the 'famous' bunch of heatsink today.
I wouldn't recommend that PSU at all. Replace it with a Corsair, hx650 or tx750, or another reputable brand (I highly recommend Corsair, all my psu's are corsair, but corsair isn't the only good brand. I just prefer them)
If you can afford it, get 2 of those drives for raid 0 (like me

)
For fans, those red yate-loons go on sale for $2.50 on ncix. For high static pressure HS fans, I recommend Scythe S-Flex 1600rpm, nf-p12, or Gentle Typhoons (in increasing order of greatness)
Here's a tip for the optical drive: My first Samsung was doa, I'll never buy samsung again. I have an Asus drive now, and it isn't as fast and isn't quite, but it vibrates a lot less, so it's in theory better for the hard drives.
P55 doesn't have enough lanes for full 16x16, so I wouldn't recommend the "grab a 5770 now and crossfire later", because CF is a huge hassle and you'll be cutting bandwidth for each card, so just get a 5850 if you can afford it.