Some of the coolest bags I've seen were a pair of old medium sized Samsonite hard plastic luggage bags bolted onto an old high mileage critter bit bike. I forget the make. An old Kawi Concours maybe?

All that pretty & spotlessly clean stuff is just a headache in the making.
"Oh no, it's raining"
"Oh no, its a gravel road"
STFU and ride