You've got to be very carefull with magnetic bags when you take them on and off as the slighest piece of grit will scratch the tank. By nature of the way the magnets hold them on people tend to drag them off a little when removing them and bingo, nice scratch in yer paintwork. I've seen it a few times.
Found taht out when i had the R6, so i use that rubber mesh stuff you use to stop your tools sliding in your tool box, on the tank, then on goes the magnetic tank bag. Sorted
I went to Italy with a Baglux on the tank and an Oxford on the seat hump.
The baglux is fine, even comes in handy when you getting tired, you can rest your chin on it. The only real draw back is the fact that you have to uncip the front so that you can fill up now and again The oxford pack works well also, the drawback with this is if you are short legged like me you can't swing your leg over.