The consensus is that the AutoPilot Pool Pilot or Digital Nano series, or the Hayward AquaRite / Goldline systems are preferable.

You should get the largest unit you can afford and turn it down, since SWCG life is a direct function of 'ON' time. On average, a unit that operates 1000 hours per year will last 1/2 as long as unit that operates 500 hours per year, but system cost does NOT double, as output doubles.