I had some of the components (CPU, GPU, RAM) housed and air cooled in a Fractal Design case for quite a while because I didn't have the opportunity to build a custom loop for an extended period of time for work reasons. I was lucky in that the Calypso case from Yuel Beast became available in the meantime. I am more than happy with the result! I use it mainly for work (for which the PC is massively overkill, considering I really only use Word, Excel, Chrome and a few undemanding CRM tools), and of course some sweet 4K/HDR gaming.

I left the colour of the coolant up to my little kid, and I probably wouldn't have chosen a solid purple myself, but I like the cyberpunk-y/sci-fi touch in combination with the different materials and reflective surfaces.