I have a Nikon D200 with a 18-70mm lens together with a couple additional lenses. The kit has worked well and produced good images and I intend to continue using the system for the majority of my photography. However, with 'age', I am beginning to be-grudge the amount of weight and rucksack space it takes up when on a day in the hills. I am looking for something smaller and lighter (for a mountain day) which will retain the image quality of the Nikon, enable me to use filters (polarising and neutral grads), have good wide angle capacity for landscapes, reasonable macro facility, and be 10 - 12MP. It does'nt necessarily have to be a SLR. Do you have any suggestions re what might be suitable now or in the near future?