I started playing with different lighting (t5, mh, combo) and I still like LEDs best. I like the look of the cheap Chinese led units. Just my personal opinion.
I've been talking to some people on this subject. Why do we have to have 0 tds? Have you seen your mixing bucket lately? What happens to 0 ppm rodi water when it hits that bucket than add salt? Will >50ppm make that much of a difference when going into your tank? I can't remember the last time I changed my filters. I know for a fact I've never changed my membranes.