I am a firm believer in the Ortlieb Backrollers and Frontrollers. I have had a couple of other pairs of panniers that I used very little, always went back to the Ortliebs.
Do you have a good idea on the volume you need? The backrollers are about 40 liter for the pair, 25 liter in a pair of frontrollers, thus total of 65 liters if they are full. One nice thing about the rollers is that they work well if less than full because you can roll the top a few more turns.
Carradry rear panniers are larger. I bought a pair for a trip because of their size but to make a long story short the trip did not work out so I have not used them, but that was not the fault of the Carradry. They were rated at something like 56 liters but I think they are closer to 48 liters. I also got the front Carradry panniers but I do not like them and would not recommend them.
My Ortliebs are about 10 years old, assuming that they have not changed the hook design very much, you can easily adjust the hooks fore and aft to make sure you get enough clearance to avoid heel strike, but not too much clearance as you move panniers further back the handling often suffers. The Carradry hooks also had good fore and aft adjustment.
I do not know if your rack is black or gray, if black you can use black fingernail polish when you get home to replace any wear spots on the rack.
CLARIFICATION ADDED NEXT DAY.
Where I said I "did not like them and would not recommend them" I was talking only about the front Carradry panniers, the rear I may use on a future trip.