More development of logo...

I have established the position of type within circle for my logo now, now all I have to consider is the colour that I am going to use. I think the greyscale variations are going to work alot better and will be more versatile.

Above: different layouts that I could go with, I am like the 1st and 3rd logos at the moment.
I have gone back and looked in to my logo again....I still thought there was something i wasn't happy about, it only needs refining ever so slightly so I have adjusted it to make the type less obvious and I wanted to put more emphasis on the 'k'.