I run a 2TB Seagate SV35.5 HDD and a 120GB Corsair Force 3 SSD. I have the 2TB HDD because I write a lot of data, on a daily basis, but wanted a fast boot time, and having gotten it for $70 from a friend, also went with a 120GB Corsair Force 3 SSD. In retrospect, I wish I had just gotten a larger SSD, caughed up th change fora 512GB, or even the new 960GB or 1TB SSDs, but for my needs, 2TB is more than enough, and the speed of HDDs doesn't impact me much.
Thanks for the great competition, as always.