Thanks for all the replies,

This is what it looks like with out the logos:

I think I like 1 and 3,

I don't like the edges on the fourth shot as you can see the tooling marks which break up the colour. (I turned the samples around for my later shots).

On the 2nd shot I wish I had spaced them out equally, I didn't notice when I was shooting but it looks a bit messy....