Leonard The 24-70 is a great place to start. If you are doing landscapes the 14-24 F2.8 may be a better choice than the 70-200 F2.8. You might consider renting them to see if they meet your shooting style. If you dont need a very fast len their may be some prime lens that would suit your needs.
Until a few days afo I was using a D7000. Even on a D7000 the 14-24 is very wide (equivalent to a 21-35mm).