Unfortunately, you guys don’t offer it in your lineup. It’s the Spectrapure UPLC-ATO with dual pressure sensors and a variable speed intermittent duty peristaltic pump.
Out of your offerings though, I would go with the venerable Tunze 3155 as the best in your lineup. I ran one for years problem free. You cannot deny to reliability and superb customer support offered by Tunze customer service and theif USA rep, Roger Vitko. I will say that I was shocked about your lack of even mentioning any Tunze power Heads in your “Best of Powerheads” bit. These things last decades and didnt even get a mention.
Well said! I came here to mention Specrapure and Tunze as a close second.