I know how you feel. The Inca are interesting, but to me the Moche are intriguing, endlessly fascinating. My ideal trip would be a week in Lima to do a round of museums (I am also interested in the viceregal epoch), then a week or 10 days driving north, Chimbote, Trujillo and Chiclayo, etc., the arch sites in that area, Lambayeque. One of Donnan’s sites. Some of the Chimu stuff like Chan Chan, Sun and Moon. Maybe Ventarron. I guess all the Alva sites. Then back to Lima to re-view in light of what I’ve seen. I speak Spanish so I don’t foresee any problems. I’m trying to talk my sister into it, go figure. :)
Don’t miss the famous gold museum in Lima - I never saw so much. The same museum also has a fabulous gun collection.