Buying new HDD. Need help

I'm going to buy a new HDD. I already have a Seagate Barracuda 500 GB + WD Caviar Blue 150 GB. Should I get an extra Barracuda and raid 0 it or get a 1.5 TB WD Black? Which would give me more speed? I'm asking in terms of the advantage of Seagate Barracuda 500 GB Raid 0 vs a WD Black 1.5 TB. Would I really see big difference in Barracuda Raid 0?

My specs-

i5 2500k
ASUS P8P67 PRO
G.SKILL Ripjaws X @ 1600 Mhz (2 x 4 GB)
GTX 560 Ti
Seagate Barracuda 500 GB + WD Caviar Blue 150 GB
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  1. RAID 0 disadvantages: Double the chances of losing your data. Lose one drive and you've lost all the data on BOTH drives. Relatively complex to set up as compared to a single drive. RAID array is not transferable to a different PC.

    All in all, the increase in speed is not great enough to overcome the disadvantages, IMHO.
  2. Buy the WD black. Migrate your OS to it. Be happy.
  3. You will see a speed increase in benchmarks..... other than that, unless you doing video editing, rendering, huge databases etc.....RAID 0 is not what it's cracked up to be.

    read down at the bottom here:

    http://www.tomshardware.com/forum/259042-32-raid

    Another way to go is a hybrid ....a SSD and HD in a single form factor......just $10 more than the Black but ya give up half the size ....while synthetic benchmarks won't show a great difference, "real world" benchies show the Momentus trouncing the Black or any other standard drive.

    http://benchmarkreviews.com/index.php?option=com_content&task=view&id=806&Itemid=60&limit=1&limitstart=9
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