Craig,
I started with a suction cleaner that did "OK" but not great. So after years of threads and watching most of our experts switch I took the plunge. I went with the Pentair Warrior SE but would have gone with any of the similar brands if there was a better deal at Marina Spa. I was amazed at how much better the robot was. The price is worth every penny in my opinion and 5-7 year life doesn't bother me either. Pool was always pristine even next day after yard crew or when I loaded a lot of sand in the pool after dive trips. Best way to clean dive gear is in the shallow end!
My next pool will start with salt and a robot! Make sure you get one with automation mode so you can power it with a smart plug.
I hope this helps.
Chris