Planning ahead for Windows 10

[Columbo]

I have two RAID 0's with one being HDD and the other SSD. I am thinking of adding a 128GB SSD just for my OS and maybe a game or two. I have over 150 games on my Steam account and a dozen on my Origin Account. I like to do clean installs from time to time for performance reasons on my OS. Essentially I want to be able to easily install my OS if Windows 10 isn't stable. Basically, I just need a project. I only have two SATA 6.0 connectors. The other 4 or SATA 3.0. I can dump one of my optical drives and use one of my SATA 3.0 ports for the stand alone 128GB SSD. SATA 3,0 shouldn't bottleneck a 128GB drive. If it's half the speed of SATA 6.0, the theoretical maximum speed will be well below the bus speed of SATA 3.0

 

I thought about buying an internal PCIE SATA 6.0 with 2-4 SATA ports. 

 

Thoughts and opinions. 

[Columbo]

Anybody here have 5 or 6 hard drives in elaborate or complex setups?