They seem pretty much the same, I did a search on B&H, anyone have any preferences? http://www.bhphotovideo.com/bnh/con...lSearch=yes&O=RootPage.jsp&A=search&Q=*&bhs=t The one big thing I need is for the bag to be able to hold a 30 oz tank inside. I would like to go with one of the smaller ones, 17X17, I'm just not sure how well, if at all, it would fit. Anyone have experience with this? Thanks.