Originally Posted by cyphon
Clean is important. As someone mentioned, variety of materials is nice. Also, make sure the inlets/outlets are in good places and can fit even the larger compression fittings.
Try to find a signature that sets your design apart from the other guys. Example:
Koolance: All shiny silver finishes
EK: Clean and acrylic tops
XSPC: Black top over acrylic, lit up by LED
Obviously there are many others, but those are the ones that came to mind immediately
I was thinking raw copper tops, with both a shiny and brushed
style top, probably coated in a thin clear coat to prevent damage to the copper itself.