I also use the Typhoon III, great machine but a little pricey.
I would stick with a good company you can rely on if you need help.
Here is a good deal:
$135.00 - OCEAN WAVE FIVE STAGE 75 GPD RO/DI
All systems are made to order with clear 10" canister housings
Stage One NSF rated 5 micron poly sediment filter
Stage Two 5 Micron Matrikx NSF rated CTO/2 carbon block filter
Stage Three 0.6 Micron Matrikx NSF rated +1Chlorine Guzzler carbon block
RO membrane 75 GPD Dow FilmTec
Stage Five in-line color-changing DI cartridge
Quick connect fittings
Self Piercing Saddle Valve Water Supply Connection
Drain Connection
Filter wrench to make cartridge replacement easy
http://www.thefilterguys.biz/ro_di_systems.htm
Or check out
www. air water ice . com (Take out the spaces)
COMPACT (5) Stage R.O.D.I.
Fully featured, small size, fits under most sinks
*Now with clear filter sumps and an HM Digital TDS meter*
The Compact is a five (5) stage RO/DI (Reverse Osmosis/De-Ionizing) Reefkeeping system using a 75 GPD (Gallons Per Day) FilmTec membrane for truly great water quality and production rates.
The Compact uses five (5) stages of filtration and purification.
Stage 1) Heavy duty, standard industry size 10µ Poly Pro sediment filter.
Stage 2) Genunine Gem coconut carbon block acid washed* (5)µ.
Stage 3)1µ acid washed* Gem coconut carbon block filter, that removes the remaining chemicals and chlorine. This filter is rated for 9,000 gallons. Used to strip any remaining chlorine missed by stage 2.
Stage 4) FilmTec TFC membrane 75 GPD (TW301812-75).
Stage 5) One Mixed bed in-line DI cartridge 2.5 X 11" mixed bed DI.
And our complete high quality installation hardware kit with instructions.
You will get truly awesome quality water and very good production rates. An ASOV (automatic shut off valve), the TW301812-75 FilmTec membrane, lots of carbon, and with practically zero maintenance resulting in zero mineral content and zero TDS.
Acid washing assures purity and excellent flow rate.
** FilmTec provides a three-year limited warranty. Please contact us for more information.
Standard Features:
All hardware including your choice of hose bib or SV-6 supply valves.
Push-in fittings, eliminating the need for tools, tape or glue. "Plug and play."
Automatic Shut Off Valve (ASOV)
Hand Held TDS Meter
SV-6 supply valve, drain saddle, filter wrench, in line ball valve and 24 feet of 1/4 inch tubing.
Detailed instructions.
Dimensions:
19" x 16" x 6"
Price: $139.00
Either way with shipping your gonna spend around $150, both are good units and would be perfect for the amount you would use it.