2TB WD Caviar Green HDD
90 Day Warranty
Cheapest price I've seen on a 2TB, but I don't have any experience with WD Refurbs. FWIW I have 3 of these currently that have been running -almost- 24/7 for about 2 years (I believe they're the 32MB cache version though) and I've had no problems at all.
(there was a shell shocker deal around 3 weeks ago at the same price)
For posterity sake, here's a link to similar HDDs on Newegg.
Same HDD - $140 (Free Shipping): http://bit.ly/7vBKG2
Same w/SATA 6.0gbps - $130 + $7.86 shipping (Free Shipping w/Shoprunner) - http://bit.ly/o8i8FX
Same w/SATA 6.0gbps REFURB - $130 (Free Shipping) - http://bit.ly/FPs0IS