Looking in getting a good rodi system but a little tight on the money... trying to spend less then $100... I was looking into getting this system here... 0PPM Portable 100GPD Reverse Osmosis RO+DI Water Filter - eBay (item 380255124367 end time Dec-26-10 13:29:53 PST) Anybody know if this is good? Ive heard some mixed reviews about the Pure Water Club products. Or any other suggestions would be nice!!! Only need to make enough water for a 29 gallon biocube. Thanks for any help!