Okay, but why? Just quality? I was thinking I'd start with something small and cheap. Results should be easy enough to measure with a TDS meter and a clock, correct? And it appears that there's actually free shipping. So my thinking is that I'd get a cheap Chinese (Taiwanese, actually) product at a small initial cost, just to check it out. And $65 seems a small price to pay.
I'm leaning towards the Purewaterclub portable unit at the moment, but I'd really like to hear why I shouldn't.