I currently have a D90 that I love, however, I am not sure what to upgrade to, I feel the time is right as I have had mine for over 5 years. I have a few ideas, but I won't mention in case I sway the discussion, I would rather hear your valuable advice first.
I like the D90 as it is not too heavy and easy to hold (I have quite little hands so being small and lightweight is important). I have a 18mm-105mm lens and a Sigma 50mm and I use it for studio work. I mainly photograph high key stuff, and am starting to get into newborn photography, hence my need for a macro lens. However, I don't need to worry taking it outside, being weatherproof etc.
Anyway, I have read hundreds of posts on loads of websites about upgrades and now I am completely confused! Please help, and please don't be too complicated as I have a hard time understanding all the technical stuff! Thank you all so much in advance.