How is 2TB $300? I picked up two 1tb 32mb cache WD's yesterday for $59 each. With 5 year warranty's!
I do a lot of builds and I've not had a defective or doa WD in at least 7 years.
7yrs, you should have learnt about the true nature of HDDs by now. They are mechanical devices and has much higher defective rate than any other computer parts. Looking at brand + HDD is truly pathetic in terms of reliability. What a brand provides when they do eventually fail, if within the warranty period, is how they handle RMA or response to mass defects (no HDD manufactures were prone to it in history, period).
Due to that, personal data has to be backed up and with optional RAID redundancy as another layer of safety measure.
On-topic:
Anything with 500GB platters (3 for 1.5TB), 7200rpm (if for pure storage 5400rpm is fine), and as long as it's cheap is good. If it came with 5yrs warranty that'd be even better.
As for 2TB drives we'll just have to wait until they bring out 3 platter versions to drive $/GB down further than the lowest currently (which seems to be 1.5TB 5400rpm), not to mention heat & vibration. As an early adopter of 1TB drives, running a pack of four 7200.11 1TB (4 platter version) is not really ideal.