For an extra $100 you can get a bench for bench-pressing etc. It has bars on both sides to make squats and bench-presses safe to perform while alone - since the bar can not fall on you. This setup is perfect for a full home gym, if you are into doing 5x5 strength training, since it can cover all the excercises.

The pull-up bar part of this setup makes it possible to do pull-ups in different positions - with a wide and a narrow grip. It also has bars crossing the main bars, meaning you can do extra narrow pull-ups with your palms facing eachother.

Made out of steel and chrome, this cage can withstand up to 800 lbs of weight. It doesn't need to be bolted down to the floor or wall, yet it won't shake or move during your workouts.