newspaper and in-flight magazines; pen or pencil

Recently, I have been sudoku puzzling using newspaper and in-flight magazines--again. As the newspaper is not suitable for pencil and eraser--well, I have been using a pen. For easy puzzles, pen is not a problem, but I am re-learning that my preference is for high quality paper with lots of room, especially when it comes to difficult puzzles. The big-box booksellers are not stocking the difficult New York Post puzzles. Luckily, I discovered more New York Post book choices on amazon.com, and the New York Post Platinum Su Doku looks promising--I think I'll order that.