Best AIO for i7 6700k with RGB (air 540 case)

[disocpete]

Which is the best cooler for the following

 

• I7 6700k 4.2ghz
  
• Air 540 case (happy to mount either way)
  
• CoPro installed
  
• I have 3 hd120 rgb fans already
  
• Needs to be RGB
  
• budget is £50-£100
  

Post your suggestions.