Cross continent racer.

No racks?

I wouldn't. I'd be looking at Apidura luggage (front, frame and rear packs). No sticky-outy panniers destroying CdA.

Then adding some reliable mudguards (crudracers or the like) and aero-bars set up for all day comfort.

The faster of the Audax lot are moving to this model over (although most used to use rack packs rather than panniers).