I just got a 1000 M2 and Halfbacks in Gold/Silver size, they are very wide, the plus is I can put 2 issues per. But as I moved from the 1970s Amazing Spider-man to the 1980's issues in my re-bag to Mylar project for my Spider-man collection, theere is even more room when I put 2 per bag/board. Can you put 2 comics per if they are standard size M2s?
Also, I just purchased Spectacular Spider-man 1-65 from a local collector, he put them in PP/PE (not sure which) in the late 1970's/ early 1980's and never re-bagged... they had been in the same bags for over 35 years. Yes the bags were wavy and some stuck together and the boards were yellow, but the comics are in great shape. He stored them in boxes in his finished basement room (climate controlled) and they were off the floor.