Its very difficult to get nice shading and reflection on white surfaces like this ipod, but it would be nice to see a little something here - even just reflected light source on the edges to add realism - 'specular' light (in non physically-correct speak)
In both renders it appears you are modelling very flat. Take a look at
http://www.maxwellrender.com/forum/viewtopic.php?t=8755
Its Zuliban's, and the guy is a master. It has a beautiful quality and is very convincing. Look carefully at the edges of the furniture and how they catch the light. This is acheived in part by giving the edge a slight curvature or bevel, and also by careful lighting - your models appear to lack this quality and this is what I mean by you're modelling very flat.
just my opinion - hope its useful