You could, it's up to you, however the filterguys sells a RO
unit for almost half the price of the one you linked. (for $124.00) and a RO
unit for only $11 more at $135.00.
You can see all their options at http://thefilterguys.biz/ro_di_systems.htm
Keep in mind however, I bought the Ocean +1 from The Filter Guys for $199.00, also got a pump to help increase yield for $100.00, got a reservoir for the filtered water with a auto shutoff for about $50.00, and also got the autoshutoff and auto flush kits for about $75.00. Then I also got an additional prefilter since my water isn't fabulous, for another $40.00 So when it was all said and done I spent $450.00 when it was all said and done, but that is for an extremely efficient, totally hands free system. You would be fine with getting the $124.00 system with a large garbage can and shutoff float for well under the price of the one you linked from Lowes and it will still be an excellent system.