Well, if you're going to go with an ortho film, then I would recommend using x-ray. I use it quite a bit (green sensitive). It's cheap. Just be careful as many x-ray films have emulsion on both sides and scratch easily when wet. You can get a 100 sheet box for around $40. I just checked ebay, and some people are actually selling 100 sheet boxes for ridiculous prices like $400 and $1000 for 14x17 (which I use sometimes). Try actual suppliers like cxsonline. Prints are quite sharp for contact printing. Reciprocity isn't too bad.