Don't waste an SSD on games where there will be little real benefit. SSD's are best used for OS and applications that employ lots of small filesize random reads. Real world OS and application performance (ie. click the icon and instant open) is far superior on a modern SSD than any hdd can offer.
I used to hate having to wait 10-20 seconds AFTER my OS had booted to open a plain browser window, or 30-40 seconds to fully open Photoshop. With an SSD Windows is fully ready as soon as it has finished booting and Photoshop opens within a few seconds. Almost every other app opens instantly.
I keep my OS and key applications (Office, Photoshop etc) on the SSD and my games, pictures, music etc on hdd. This is by far the best combo for performance, capacity and price.
Once you have owned an SSD, you will not go back to hdd.
edit: I use about 35GB of my SSD capacity and have over 2TB of used hdd capacity. The SSD contains the programs I use >90% of the time.