Hexes in RGB gives you the option of changing colour either to preference or by temperature. Currently my pump, GFX and CPU blocks each change colour according to their temperature and the res and front light change colour based on the coolant temperature. Hit the max of 4 RGB controller channels the Aquaero 6 can manage. Could hand some of them off to the Farbwerk I believe if necessary but prefer not to have any USB connection to the Farbwerk that I'd need to configure it.
Farbwerk will give you four channels of RGB strips. Go for the light water resistant type (there's a heavier one that's sort of set in plastic like a rope light but the lighter one just has a gel covering set onto the strip) not for the water resistance - although that could be useful in a worst case scenario! - but because on the non water resistant versions the contacts are exposed every 3 LEDs so that you can cut to length. Problem is that you can short them out fairly easily if you're a klutz....like me