Todd, I have just been to Egypt and throughout Africa. Luxor is great, the Luxor and Karnak Temples just amazing, as well as the Valley of the Kings. If you have time constraints, there is no need to go to Aswan, not really much there, only a dam and Philae Temple, which is OK. I would suggest you bypass Kenya and safari in Tanzania - it is amazing. Head to Arusha and do your safari from there - Ngorongoro Crater and Serengeti are far better than Kenya. Nairobi has nothing to offer, but Arusha is great. Also, Tanzania is far cheaper.