Hi there PCBuilderMonster,
Reliability is hard to define. Sometimes, you may just lucky/unlucky when getting some kind of hardware. The only way, I can think of, to measure reliability of a given product is the warranty. You can check out the WD Black which huilun02 already suggested. The WD Black line offers 7200 RPMs, up to 4TB and 5 years of limited warranty.
WD Black:
http://wdc.com/en/products/products.aspx?id=760#Tab2
Hope this will help,
D_Know_WD