Thanks for the feedback.  I will rework the rig setups tomorrow.  I was including the larger than necessary hard drive and RAM figuring it would be good if people wanted to be able to use these as normal computers as well when they weren't mining.  I will change these into more barebones systems and reduce the prices.  I was undecided if I should go for the extra to make it more of a functional computer other than for mining, but it looks like a straight up mining rig would be better.  I will also take the suggestions regarding different choices in cards.