Before you pull the triger on that unit check out AquaFX. I believe they are a sponser of AA. I had them build me a 4 stage RODI
for $125 delivered. I asked them to build me there "Baracudda" model without the pressure gauge and in-line TDS
meter. I already had a hand held TDS
meter and the water pressure was not that important to me. They make great filters and stand behind them. Give them a call and see what you can work out.