as an aside, whatever rack. you end up using, be sure to look into putting some blue loctite on the bolts when you mount it--and in the first bunch of days touring with a load, check the tightness of the rack bolts.
Its super common for rack bolts to loosen up a bit, and loctite helps keep them from loosening.
I also go over my bike once a week or so and check all the bolt tightnesses when going over things, cleaning the drivetrain etc, really good habit to get into as it helps avoid losing a rack bolt and damaging threads.