Hey guys, I have a dilemma and need advice. Currently I'm shooting with a Samsung nx100. I enjoy it but am not getting as clear shots as I would like. This next year I'm thinking of A: buying a new lens for my current camera, ( i have an 18-55 on my camera and was thinking the 50-200 fstop 4.0-5.6 or B: buying the Sony a7000 when it comes out. The thing is, I will probably only buy the basic lens with it if I go with Sony because of price. I'm on a tight budget. I would like whatever system i run to last me another 5 years. What should I do?