I have just been surprised with a trip to South Africa. It isn't till summer, but I have been given a budget of $5,000 for supplies. For photography, I am thinking D700, 24-70, 70-200 possibly with a TC. Any different reccomendations? We will be shooting in South Africa. Currently, I only have a D90, 16-85, and 50 1.4. Thanks Alot.