I have my Define S, with two of Fractal's GP-14 fans. They are great, but I want some better looking ones, they are quite plain imo. I have been looking at the BitFenix Spectre Pro's and the Be Quiet! Pure Wings 2. The Pure Wings are quite a bit cheaper, but I am not focusing on raw performance as the Spectre Pro's would look extra nice imo. Any other fan suggestions are welcome, I prefer 140mm ones though, and the budget is around the price of these fans, hoping not to go over £15 per fan.