It's really up to you...Sleep on it, there is no shortage although I know you want to get them on ASAP
I went through this, ended up getting HT Denali cliff cut. They are strong, take in lots of items, all flat surface - perfect for mounting extra gas, tool tubes, etc and have a narrow profile too, so if you don't do traffic - if altrider bars clear between the cars, denali cliff cut are also clear :bike_rider:
Do you plan on carrying extra fuel? If so then what brand: rotopax? blitz? where do you plan to mount them? Caribou and other side loaded plastic cases have the seam where the two halves of the case case comes together, so you'd need to locate flat surface on the case while maintaining narrow profile if that's your thing. Blits can be mounted to passenger pegs. Just plan it thoroughly, don't rush.