I went looking at home depot today for an under the sink RO water filtertration system. They had a GE system with an expansion tank, 2 filters, faucet, and all other hookups for about $169. Is this an ok brand to use? They had plent of other water filters there, but they didn't specifically say RO on them. This is the only thing that I do not have for my tank that I have been meaning to get.