Thanks everyone for the answers you have provided me.  All of you have been quite helpful in assisting me make my decision.
 
I need a larger Hard drive as I have a SSD and and want to get 4 TB, however, the price is ridiculous.  I am considering a Seagate 4 TB SSHD which is not as fast as an SSD, but is faster than a traditional HD. The SSHD is actually an SSD in a HD case, and it remembers that most frequently used programs so that it recalls those applications much faster each time they are used.
 
More information here about SSHD from ~~~> Seagate SSHD 4TB 
 
Thanks

If feasible a 3 drive setup is usually recommended..

Programs and Plugins
Projects
Sample libraries.

This link answered a myriad of questions for me, maybe it will help you as well.
http://www.cakewalk.com/P...s/SONAR/Membership#FAQ