A little more exposure time on the sunsets would have helped, I think. Unless sunsets for some reason are different to photograph than sunrises, in which case my advice is less justified.

Here are some sample sunrises I took with some layman Sony camera.

http://public.fotki.com/masterN17/co...sula/cp26.html
http://public.fotki.com/masterN17/co...sula/cp28.html
http://public.fotki.com/masterN17/co...sula/cp29.html
http://public.fotki.com/masterN17/co...sula/cp36.html
http://public.fotki.com/masterN17/co...sula/cp37.html
http://public.fotki.com/masterN17/co...sula/cp38.html