Are you doing something very complex? Or something with a lot of graphics? If not, then an Automation Direct C-More is very hard to beat on their price. I've had good luck with them holding up and our environment is kind of harsh. Quite a bit of coolant mist, people get crazy with garden hoses, and I've seen operators push buttons on the screen with cast aluminum parts they are supposed to be loading on conveyors. They have nowhere near the bells & whistles of an AB PV, but for the most part I just need to display some indicators and give momentary on to some input bits so they work for me.