I would also recomend PWC 150 gpd system. I have one and am pleased with it performance.
I will admit I had one blowout but it was not due to inferior workmanship as much as operating outside of the design envelope. I had a coldwater line ice up on a unified outlet. To I ran 90 degree water through the system for like 20 minutes

This caused a waterline to come off when the plastic softened. I believe this would have happened with any system. The membrane survived an continues to run about 3-4 TDS.
As far as needing to replace the whole unit in 5 years, I read that in the instructions as well. It is made out of plastic and maybe it will. I will cross that bridge when I cross it.