My wife and I are just back from Luxor and used Petra Tours based in Luxor - run by the amiable Ahmed for 2 private tours. He booked a Cairo day trip for us with transfers, flight and guide in Cairo. For a little more he through in a tour of the West Bank (Valley of the Kings and Queens) which we did 3 days earlier. I paid considerably less than had I booked through Thomsons/Thomas Cook and all went like clockwork with 2 good helpful knowledgeable guides and comfortable transportation. Ahmed even rang me on our return to Luxor that evening to check all had gone well and to thank me for the business and for recommending him to a couple at our hotel. Wouldn't hesitate to recommend him. Hope this post helps others as I know I was looking for similar advice before we left UK.