The most reliable stats by a mile (IMO) are the thermtec ones that connect to the immersion heater via 2 spade connectors.
Obviously the imm heater is made to fit them. Dont know what yours are.
If you are just on the usual rod type ( again my opinion ) the best ones are the sunvic vk series. , The only problem with those is they do not have an overheat built in , so assuming you have room and another pocket , you need a vkl 2351 to act as your highlimit.