I am planning on getting a cheap squat rack, so I can get rid of any excuses of not doing proper squats.. The problem, is space and money, both are limited. So I am not looking for something fancy.. just something where I can place a bar high enough basically.. I have about a week before I decide, but the sooner the better of course . Also on a side note, is there any advantage having rubber weights than cast iron weights? and also, what's the difference between standard weights and the olympic weigths?