Reverse osmosis systems

Was just wondering what RO systems any of you guys were using. I probably need one that runs 50GPD, but have never actually used one before, figured I'd ask for opinions and prices, thanks!

http://www.bghydro.com/BGH/itemdesc.asp?ic=WTROSB01&eq=&Tp=

This is what I'm thinking about getting, I don't see any reason to buy a $300+ 5 stage RO unit if I'm not using well water, I'm using city water. Any input?

This is the one I got

http://cgi.ebay.com/Zero-0-ppm-Reef-6st-Reverse-Osmosis-RO-DI-Water-Filters_W0QQitemZ110355446113QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item110355446113&_trksid=p3911.c0.m14&_trkparms=72:1205|66:2|65:12|39:1|240:1318

It doesn't come with a storage tank, so you will want to buy a RO float valve. YOU WANT THIS? It turns your system off when your water storage bucket/barrel is full. I tried without one, and had water on the floor when I didn't shut it off in time.
Mine is 100GPD, but that depends on your water line pressure. THEY ARE SLOW! Without a storage tank, you get less than a "dick trickle" out of the fresh RO line.
If you think you may want to use the RO for drinking water, then look into a system with a pressurized storage vessel.

I got an under the sink system like this. Gives me drinking water and I can also take water off 4 gallons at a time for the grow. Which is fine for a medium soil grow. If you are looking at a bigger hydro grow though, your link or the first eBay one might be better.

http://cgi.ebay.com/100-GPD-Reverse-Osmosis-6-Stage-with-Permeate-Pump_W0QQitemZ220365785228QQ

Save yourself some time, trouble, and money. Get a HydroLogic Stealth 200. It will pay or itself in a short period of time. I first bought a Stealth 100 but it is just too slow. Now I use the 200 and have the 100 as a backup. I just should have bought the 200 to begin with.