This is some fantastic recolouring, but I've noticed one probelm. If you look in the 4th edition Space Marines codex, it says that this is a picture of Captain Uriel Ventris of the Ultramarines 4th company. Only the 2nd company have the golden shoulder trims as seen in this picture, the 4th company have green trims.
Still, I'm not saying this is bad, no no no, this is great! Well done.
I've noticed most Ultramarine pictures/models (including my own) have the gold trim regardless of company (aside from 1st), probably because this was the colour advertised by GW so much. That, and that not all space marine fans own a codex. I know this may not follow canon, but hey, GW is generally open to saying "do what you will" with this stuff.