[Journeyman Traveller]

Hi there! I am a newbie, both to this forum and to this site. I am very much an amateur photographer with limited experience beyond point and shoot, but I want to learn. I hope I can ask for some advice.

I am hillwalker, backpacker and traveller. I am also writing a blog on backpacking. Have a look at my blog to see the sort of pictures I have taken. I am looking for a new camera which must fit the following criteria:

Take really sharp, pin-sharp, pictures usually of landscapes, in varying lighting conditions;
As light as possible; and
Will allow me to get better and learn more about photography without me needing a new camera as I get better and take advantage of my learning and progression.

What else should I be thinking about?

Thank you in advance...