Best RO unit?

[lastlight]

if you're ok with manually flushing your membrane (i do it before and after use) and prefer a more efficient ro membrane (75gpd dow filmtec is better than the 100gpd) I'd purchase any basic setup and fit it with the 75 gpd filmtec and a dual tds meter. i'm assuming your household pressure is already fine.

[spit.fire]

vertex hands down

[sphelps]

I've had 2 vertex 100 units in the past, nothing but issues with them, from leaking or noisy pumps to bad o-rings and improper water path flow through the DI. For the money the aquasafe is the best bet for sure, never had an issue with mine when I had it.