SSHDs are pontless.
There is not enough cache to hold OS and progrmas, and their price point makes them barley cheaper then an SSD.
If this is for a second drive then get a 7200rpm HDD, if for OS/Programs then you should be looking at an SSD.
If at all possible go with Samsung EVO. There are alot of cheap drives that are not very good (Sandisk Plus, Toshiba/OCZ, Kingston UV400, ADATA, etc).