The Fitness Reality 810XLT Super Max Power Cage is a free standing piece of equipment, perfect as a part of a dedicated home gym. It can handle up to 800lbs of weight, and can be combined with a bench press (sold separately).
Pro Great for a full home gym
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.