I put all my games on a SSD just because I can afford to and I like the quicker load/cut screen times.
Depending on your budget get the WD black if you can afford the extra 15 bucks or so over the blue drive either will work just fine.
WD is also making a WD blue SSD that I have not used or seen any professional reviews on.
If you wish to load everything on a SSD their no reason to get a expensive m.2 or something like the Samsung 850 Pro I would avoid the Kingston V300.
EDIT found one from AnandTech not a bad looking drive in that price range.
http://www.anandtech.com/show/10741/the-western-digital-blue-1tb-ssd-review