How do I choose sensor for compas

[Didier B]

A good compass is the basement to build a satisfying autopilot.
Many different IMU sensors are available on the market, mainly addressing the drone applications.
My question is : WHICH IMU should I select ?

• It needs to be in the list of those compatible with Pypilot ;
  
• It should have the best dynamic ;
  
• It should have the best S/N ratio ;
  
• to keep clarity in design, the module (breakout) should NOT combine with other sensors (environment)
  
• of course it should be affordable (a few tens of roros!)
  

The above considerations take me to this point : Dev. team, please tell us what is your preferred IMU module for Pypilot  ?

I will have more questions regarding physical on board installation...