Thanks a lot guys. Not so much a seasoned Cairo hand - I still get a big kick out of visiting. Just those first minutes after you get thrown out of the order and comfort of an airline cabin into the bank/visa/taxi chaos can be a bit fraught...
Anyway, as the hotel (IC) wants EGP155, and I seem to remember EGP40 gets me downtown from the airport with no great effort, so EGP 80 fits in with your ideas. I'll report back!
In all my visits this will be the first time I've seen a pyramid