The Antec 300 case has plenty of room for 2 x graphics cards. It also has great cooling with all the fans installed. I usually recommend the 300 Illusion as it comes with the fans. This is my go to case for budget builds.
4 Years old it is not the "New" 650. It is not as high a quality as the newer version. It is still fine for 1 x 560 and probably 2 x 560s but Antec really entered the high quality PSU status with its "New" line.