I'm looking into getting a portable reverse osmosis filter and am hoping for some recommendations or even tell me about what to avoid. It needs to be portable because I live in an apartment and in the future hope to spend more time 'out and about' . . . a BIG hope! Capacity isn't a big deal as it would be used for drinking and cooking. Right now I'm considering either the 50gpd or 75 gpd sold by PureEarth, but can't find any reviews for their products or service. So, can anyone recommend a good portable RO unit or have thoughts on the ones sold by PureEarth? Thanks!