Update - I got my roof up
Since that original post I decided to use the painted galvalume roofing. The prices I got for aluminum were terrible. I found a guy in town that would cut it the correct length and give me instructions on how to put it up. They delivered it and all for a good price. I followed his instructions and it went up quick and looks great. It took me two days to tear the old roof off and install the new metel roofing. I used 30 lb roofing felt under the metal. The reason I did not want to use shingles is that I tried this on a small project one time and it took me for ever to complete the job. Unless you have several people to help you I would not recomend shingles. Working by yourself this is the way to go.