If you can afford the 8 foot aluminum with the steel frame, do it. By about state fair time, we had problems with heifers' back legs being even with the back of our 7 footer (we keep heads out of the head gate because our cattle stand better like that usually and it makes it easier to fit front legs). We stretched ours to be just short of 8 feet and love it. When we bought it, our trailer was not tall enough to hold an 8 footer when it was stood up. Since then we have gotten a new trailer and started hauling it folded down and wish we would have gotten the 8 footer. The extra length really helps to keep everyone comfortable and happy when fitting. ;D