Just threw those links in for info. I purchased my system from BWI, no experience with Buckeye. BWI may be shutting down their online business, the owner got busy with other ontracts or something. Here's another link, to BRS, they seem to be a popular vendor and sponsor here as well I think. Again, no personal experience but I've heard good things.
http://www.bulkreefsupply.com/RO/DI-..._97/index.html