Nikon USA has already made the 5 years old Nikon D300S as an archived product.
Nikon D7000/D300S are best selling APS-C DSLRs from Nikon. D7000 is replaced by Nikon D7100 in 2013, and D300S will be replaced by Nikon D400. Here are several recommended lenses for the Nikon D7000/D300S.
Note: Before buying lenses, you may take a look at Nikon lenses “Buy More, Save More” Deals
DxOMark labs have tested 100+ different lenses measured on the Nikon D7000 and Nikon D300S, the best lenses for Nikon D7000/D300S are listed below: