I have been using a Milwaukee MT102 PH meter with pretty good results. However the probe has recently gone bad and needs to be replaced. This is not a cheap replacement (about $50). I'm cool with the upkeep and cost of ownership of a PH meter, but I'm wondering if its worth it to continue on with this meter or if another type would be more ideal. For about the same cost I could get a Milwaukee PH55, which has a probe that is cheaper to replace and ATC that is all contained in one unit. Whereas the MT102 has separate Temp and PH probes (can be a bit cumbersome). Any thoughts from anyone using either of these PH meters?