Darren,
All shots are outstanding. But I really prefer the compositions where the point of the reflecting pond lines up with the top of the glass pyramid as in the second and third shots. That front point of the pool catches my eye right off and then I'm lead up the pyramid when they line up. My eye kind of wanders around some in the first shot.
great series. i like the split toning in the first one and the symmetry of the last. great comp. in the second one, i like how it has the building behind the pyramid.
i loved the sigma 10-20 when i owned one... wish they made one for the fuji x-mount.