can anyone tell me what are the best afr meters are and how much and where from i have a myoo

 

'The best' are about £1,500 and run from their own wide-band O2 sensor. I don't think you want one of them?
The 'normal' ones all measure from the standard 02 sensor, so the measurements will all be the same - just find one that displays the information the way that you want it. Some have whirly disco lights, others flash up & down... some lots of lights, others only 5 or 6... all do the same thing.

 

Do a search on the site - there are a number of related threads including one with a DIY solution.