I really like the way you have captured the reflections in the first, the detail is quite impressive with that one.
I also like the 2nd, its got a very "set-up" feel to it, even though its a nataural shot if you get me, there are no imperfections in the sand etc is what I am saying and the water is very straight. I dont know if that makes any sense as to why I think it makes it a good shot but I hope you see where I am coming from