I really like the lower rails on the racks I use for touring to mount the panniers lower for a lower center of gravity.
On my Nomad Mk II or my Sherpa, I use the Tubus Logo EVO. Solid steel rack, very stiff. But, if you do not have panniers mounted, this rack top platform is quite narrow. I only use this rack for touring, not for riding around near home. For riding without panniers, I want a wider platform, use other racks for that.
And on my Lynskey Backroad I use the Racktime Addit which I believe is now discontinued, this rack is aluminum but still quite solid and stiff.
I use black fingernail polish to touch up wear spots, but for touring I put some plastic hose on the racks to prevent chaffing.
First attached photo, the Logo on my Sherpa. No hose is shown on this rack, this was on a tour in 2012 before I started using the hose.
Second photo, I have one pannier on the Nomad with the Logo, you can see how the lower rail lowers the pannier nicely. The plastic hose is quite apparant.
Third photo, the Racktime on my Lynskey.
FOurth photo, I do not have a photo of the Racktime with only one pannier like the photo of my Logo, this is a photo from behind the bike.
My Logo is marked as rated for 40kg, the Racktime at 30kg.
It is my understanding that they now have much lower ratings, as apparently the companies did not want their racks used for child carriers, and to do that they lowered the weight ratings to the point that they are not allowed for carrying child seats.