When I read your first post, I assumed you were going to get both the SSD and Samsung F3 HDD because the SSD is only 40 GB. I assumed you were going to use the SSD for your boot drive and the HDD for all of your other files.
However, if you want to save the cost of the SSD and just use the HDD that is fine. The SSD really only helps to cut down on boot times, so if this is not important to you, then drop it. The Samsung F3 is extremely fast for a HDD, and is an excellent choice.
Good luck with your build.