I bought the Saddlemen R1300LXE Deluxe Motorcycle Roll Bag. I have a backrest and the Honda rack and tried strapping the bag onto it and it just didn't want to mount right even though it had several ways to mount. Also the bag was collapsing onto itself without even getting it installed. It was the right size for me but the quality just wasn't up to par. I ended up sending it back with no problem to Bikebandit.
I have since ordered the Kuryakyn Classic Tour Bag which i have seen in person and is more money but much better quality. It's a little wide to fit on the bike with the antenna on but I took the antenna off and the radio still works(but probably has less range) They do make a day tour bag but it was just a little small for what I need to use it for, which is quick access for my full size camera and little ice chest that I travel with. I'll take some pics when I get it fully packed. It'll probably look like the grapes of wrath lol because of my hoteling and camping needs but not too bad haha