I have a kenmore brand ultrafilter 150 I think that I haven't set up yet. Its really just a drinking water RO, with the pressure tank and faucet. Not sure of it performance wise, and its not DI. If you're interested I'll figure out a little more about it.
I picked up two brand new ones on clearance, and figured it'd be better than treating city water and trying to use that, and a whole lot cheaper than the nice RO/DI units.
-John