just came in these awsome units, 4 stage, very nicely built, big display, Tds Meter and Booster pump, all in one unit.
only $334.99
you can find more information here;
http://www.aquavalley.ca/eshop/index.php?main_page=product_info&cPath=1_90&products_id=2593 (http://www.aquavalley.ca/eshop/index.php?main_page=product_info&cPath=1_90&products_id=2593)