I know I know I know, I should already have a RO/DI unit.  But I am currently using tap water :( . Since i'm setting up the bigger tank I figured this would be a good time to start fresh and use only RO/DI water.  So I've been looking around i'm probably going to end up getting this one as of now

http://www.bulkreefsupply.com/store/review/product/list/id/521/  I've read a lot of good reviews. 

I also saw some people talking about these on some other forums. http://cgi.ebay.com/100-G-Aquarium-Reef-RO-DI-5stage-Reverse-Osmosis-Water-/180544571860?pt=LH_DefaultDomain_0&hash=item2a094b89d4

What do you guys/gals think or suggest. Preferably around here price wise.  I was also looking at BRS build your own. If you were to go that route what would you run?

Thanks in advance.

Or this one its $135 after the club discount.
https://ssl.zoovy.com/theh2oguru/c=plTgceQXP23Idx2uDzeR4fADj/s=airwaterice.com/product/1TYPHOON

I have the one from pure water club on ebay. I have well water that tests at 519ppm at the tap and it exits at 0ppm.

I have the bulk reef 6 stage 35 gal unit.  Love it!!!  Great customer service,  you can package replacement filters or buy singles