I recently posed a thread asking for opinions on which medium format system I should seriously look at for my step up from 35mm. Over the past few hours I have read all the responces and talked to a pro photographer that I met and I now have been faced with another question: should I skip medium format and just make the jump to 4x5. I knew the negatives were larger, but I didn't think about the limitless possiblities of being able to correct the perspective and focus plane. One of the things that I am worried about is the cost of film. Other than that, I was wondering if anyone might have a few recomendations on brands and about how much it would cost to get set up in a beginner 4x5 system. Oh, and what is the learning curve for the jump to 4x5, are there any good books and ways for me to teach myself? Thanks for the time.