I saw a lot of chatter about DOA reds when the 3TB ones first came out, but it seems to have died down, so I'm hoping whatever problem there was is fixed, and maybe that could be why the greens and reds are taking so long to arrive? Both for 2TB and 3TB, green drives were available before blacks....
I've had bad luck with both Seagate and Hitachi in the past (original IBM Deathstar). I'm planning on upgrading my PC after Haswell comes out, and it is also my whole-home DVR with 6 tuners streaming to 3 TVs, so I need a ton of storage for it. Currently have 1 2TB green drive dedicated to recordings (which gets full often), another 2TB green used for photos/videos (both from my camera & downloaded)/installer archives/music/kids TV shows that never get deleted, and SSD for OS. More 2TB drives in an external eSATA enclosure for backups.
The reds weren't around when I built the current system. I figure they would be a better fit since I would be using multiple of them and never shut down.
I was considering using Windows 8 storage spaces to make a ridiculously huge logical drive and never have to delete recordings, but read bad things about both the performance and the stability of that. A coworker swears by FlexRAID, and has a 24-drive system with it.