I would appreciate some advice please:
I use a Nikon D3000 (I am pleased with it) with 18-105mm and 70-300mm, both stabilised lenses. Probably stupid to get both of these but the Nikon 18-105 was my first lens and I then wanted a longer reach and got the Sigma. The stabilised Sigma is in my humble opinion a really good lens ... for my price range and skills.
For 'size convenience', general photography and occasional low light situations, I am looking to purchase a prime lens ... the Nikon 50mm F1.8 AF-D. This is not an expensive lens but seems to have very good write-ups. Is this a good choice for my next lens?
Also I am of the view that its now time to get a shoe mounted flash instead of using the pop up when needed. There seem to be two options for me ... the Nikon SB400 basic flash and for a slightly lower price here in Norway, the Sigma EF 530 DG ST which is actually a more complex unit. In the forseeable future I don't think that I will be into 'multi flash' usage. Any recommendations?