Looks good so far, however theres a few thing I would change.
It all seems a bit messy and you dont really know where to look first.
I would drop down the navigation bar section beneath the logo and if possible make the logo a bit bigger so it seems a bit more spaced out. I would do the same with the search bar.
I would move the login bars over to the right and bring them together with the "forgotten password" text as this is the first place you realise you have forgotten your password and you want your visitor to feel as though your site is easy to use and navigate.
This picture seems to be a little too big compared to the amount of text on the right, I would make the picture a little smaller which will then also bring in the "related products" into the browser without having to scroll down which I think will be really useful.
The sharing icons seem to have just been plonked randomly in the middle and dont really have any order to them. I would have the item description and specs nearer the top and then the sharing icons placed in the blank space beneath the related items part and to the left of the customer reviews.
Hope thats helpful