Unless you really play multiple games every day, you can get by with a 120gb SSD. All you need on it are OS, main programs, and the one game you are playing every day. Everything else can go on the hard drive. Plus, read up on guides regarding deleting old OS installs and such, to keep the SSD as clear as possible. When you feel like getting into a new game, move the other to the hard drive and install the new one on the SSD.