I just bought one and it took about 2 months before i finally made up my mind. I got one from the following link. I went with the 4 stage value line RO/DI 75gpd.
http://www.aquaticreefsystems.com/
Ask For John tell him Rich from Virginia sent you.
THe price with a few options DI bypass, Faucet adatper, the Washer maching hook up adapter is a good idea, since you waste 3-5g's per 1g of good water, YOu can use the "waste water to use in washer machine (waste water is same thing that came out of faucet) and S&H was $182.00
If you become a member at .. (membership is free)
http://reefcentral.com/
You will get like 10% discount
Rich
PS you can always search ---- there are a lot of good deals on there.