new hair?

i'm debating whether to have a change in hair colour, i'm thinking going either a caramel or a dark ash blonde colour. i've currently got my hair dresser trying different shades on a few hair samples, and i'm going in next week to see how they are. if i do go lighter im not going to do it all full head straight away i'm thinking of gradually building the colour so its not too much of a shock to the system-ha! this is my hair colour currently!

It looks quite dark on this picture but it more of a medium brown colour. what do you think?!x