Also - I would strongly advise removable roof rails, if you can make it work.
They can be really noisy at motorway speeds (conditions depending) and 150 miles of a solid whistling sound can be really testing. Ours are removable and we are lucky enough to have space to store them. It requires a bit of forward planning to install them, but once you get used to it, it's a 5 minute job.
My tinnitus wasn't helped by my car screaming like a Stuka all the way to Norfolk I found Duct tape over the ends and the channels on the bottom (+top if aero bars) worked.
+1
Also - I would strongly advise removable roof rails, if you can make it work.
They can be really noisy at motorway speeds (conditions depending) and 150 miles of a solid whistling sound can be really testing. Ours are removable and we are lucky enough to have space to store them. It requires a bit of forward planning to install them, but once you get used to it, it's a 5 minute job.