Two seem to have emerged: the Hach Pocket Pro + and the Milwaukee MW 102. This does not mean that there may not be others equally as good. Omega has a relatively new pen style meter that one or two people have tried and seemed pleased with. The Hach and the Milwaukee get the best marks from the HBT Consumers Union because several users have done the stability checks described at https://www.homebrewtalk.com/f128/ph-meter-calibration-302256/ and had favorable results.
The Hach meter is a pen type and it does, IIRC, allow calibration with buffers of arbitrary pH whereas the MW102 has a separate electrode.
Which Pocket Pro+? There seem to be multiple models.
Thanks in advance.
-BD