Hi.. I intend to buy a camera.. but I do not know any thing about cameras.. when I asked about them they ,here in Iraq,told me that sony w620 is for 102$ while nikon d3100 is for 520$ knowing that the two (as I know) are hd videoing and 14 mp for pics.. so I am tired of thinking about the difference and whether nikon deserves for this difference or not?. please help