I got fed up carrying around a big dslr lke the Canon XTI?

and my crappy little Kodak m530 was exactly what I thought , a cheap point and shoot so I am thinking about going with the EVIL camera by Sony , nex 5 or nex 3 , local futureshop canda has a 300 savings on the nex 3 incuding an extra lens , I really don't need a nex 5 because I do not own a HD tv , anyone have any experience with these camera , I am a budding amateur photographer and have been told I have a knack for it but should I go with the Nikon 3100 or the Sony nex,