Its looknig good mate,
Though on the seam;
Is it a mirror of your mesh?
If so then i suggest you use the symettry modifier. This will make life so much easier espeically since it will stich all the seams for you. You will have to adjust it, so just select the axis 'X' sohuld be right for you. Then depending on your models domminent side, The one you work on, flip the mirror accordingly. After that drop down the symertry function tree. and click the mirror, Align accordingly to what you need.
Just a note, the edge seam that the mirror will be on. Drag all the vertices outwards a little bit. This is because you lose a little in the mirror.
If this is a whole single mesh then;
the smoothing groups are out and you need to correct them. In the mesh/poly tree, selct polygons then scroll till you find Polygon properties. crtl + a and select all polies and click auto smooth. After that its just a matter of correctly any of the issues by reassigning the groups.
-Con