Just returned from a fabulous Egypt adventure in April. I had an excellent guide in Luxor, Aswan and Abu Simbel, whom I would wholeheartedly recommend. His name is Emile Ghaly, and he is based in Luxor. Emile possesses excellent English and a comprehensive knowledge of the sites and Egyptian history. He was very attuned to the needs of our group, resting when needed, finding little shops with good deals and no hassle, yet still managing to cover the sites in detail with wonderful commentary and insights. I recommend him highly. Emile is a free-lancer, and is able to set up customized itineraries in the Luxor, Aswan, Abu Simbel area. His contact information - email@example.com and phone 0109372117.
Disclaimer- this is an unsolicited recommendation.