Question for those naming your favorite unit - what is your tap water TDS, and does your unti achieve 0 TDS? Also, how much assembly was required?
I bought the Aqua-Safe mentioned above, and it was a nightmare to assemble, especially for someone who had never even SEEN a ro/di in person before, much less knew how one works. The instructions the company sends are HORRIBLE. I would much rather spend the extra $50-$100 for one that is more "plug and play." Tapping into my water supply was the easy part!!! You can even search my posts on here when I was trying to assemble it. If you search "aqua-safe" with the hyphen in there, it's in the top couple of results.
Anyway, I'm thinking of asking for the Typhoon III for Christmas. I like the fast flush, the DI bypass (for newbs, this allows you to make drinking water without wasting your DI resin. It also allows you to test TDS before and after your DI to be sure everything before the DI is working as it should.)