I have had my PBX up for just over 2 years. I had started with 8, but am currently down to 7. All of our systems had Wyse WY-520 terminals supplied with them, within the first year every terminal had been replaced at least once, some as many as 3 times. I am looking at replacing them and would like to here from others on what you recommend as a dumb terminal instead of the Wyse.