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I lost my last TwoNav so i need a replacement. 

I ride Road and Mountain Bike.
Heart monitor would be good
Speed comparison between today and previous day on same loop would be good

ability to either follow a pre-loaded track or turn back on todays track ( when i am in unknown location )

Trial Bike or Anima + look suitable but Horizon is quite a bit more expensive. 

apart from a larger screen what are the advantages of the Horizon?

any other comments