Nice looking build, the white and red braid makes them stand out more than just the plain red. Is there any plans to paint/powdercoat the case or is it staying silver?
The loop order confused me for a while due to the rads until I worked it out. Is there any benefit in running rads like that as I thought they weren't that restrictive or have you done it because it gives and easier tube route?
As for fluid, I thought all Mayhems pastel liquids could be used long term. Your own site lists life of fluid of around 2 years
Also out of stupidity I asked him in the development thread and he confirmed around 2 years. So I would say go for white pastel liquid.
Edit: Actually really confused by the loop order. As far as I can see there is only one port out of the bottom of the res which goes into gpu, the return to the res comes from the from rad by the look of it making the one to the gpu the 'out' line from the res. So confused at where the pump is going to sit and the order it will pump in.