Make sure you are actually going to use tri-mix. Buying an Explorer or VR3 and then only using it for air will be a waste.
If you plan on deffinitely diving with different mixtures other than up to 50% nitrox you would be best to buy the Explorer or VR3. If you are just planning on air or Nitrox up to 50% then most of the regular dive computers will work fine.
If you plan on deffinitely diving with different mixtures other than up to 50% nitrox you would be best to buy the Explorer or VR3. If you are just planning on air or Nitrox up to 50% then most of the regular dive computers will work fine.