I really like my Magadans as well (I have an older MK1 model). Been using them on my Tenere before and on the Terra ever since I got it. Put near to 60.000km on the bags. Some of them in pretty rough conditions and a crash or 2. Turns out they aren't as bomb-proof as I had expected. At least not the side pockets. One of the 2L pockets now has a hole worn in the bottom corner. I saw the same on the bags of Dutch friends that have just returned from a 3yr RTW trip. Might just be a weak spot. The rest of the bag has held up really well though. Still rate them very highly.
Check out the 2017 FE501 Enduristan 7 pieces of luggage plus a ton of travel gear. View: https://youtu.be/W8nypbdzbOo
I got Nelson Rigg panniers..cheap,durable and effective..waterproof. Just a little more effort fixing them om..say 10 mins.