Drinking Water Systems from RainSoft.com

Bottled water quality without the bottle. You'll enjoy deliciously fresh drinking water all the time with one of our reverse osmosis systems. And with RainSoft drinking water purification systems, there are no heavy bottles to lug or deliveries to schedule. Just turn on the faucet and enjoy. You'll also be doing the environment a favor!
Coffee, tea, ice, soups, juices ... you name it! Anything made with water from RainSoft home water filtration systems will taste noticeably better. So will your prepared foods. After all, water is the number one ingredient in your kitchen. You'll taste the difference every time you use water from your RainSoft drinking water system.
With two premium drinking water systems, RainSoft water treatment delivers a higher quality and better tasting drinking water experience. Not only will the water from a RainSoft drinking water system in your glass taste distinctly better, but so will all of the food and beverages you make with it.

Ultrefiner reverse osmosis water systems are RainSoft's premier drinking water system. Using advanced RO technology, the Ultrefiner provides highly polished drinking water that filters out smaller particles that can be missed by less refined drinking water systems.

Choose a Water Filtration Systems - Tips by NaturallyPure.com.au

This question depends on how much spare room you have on your bench! The above bench filters being considerably cheaper as there is miminmal installation costs. On the other hand you might prefer to have all the "works" out of the way and out of site. These under bench systems usually have an attractive spout that mounts on your siink or bench.
Apart from water quality, another factor is user-friendliness. Some filters have 'push-fit' filter cartridges, making replacement very quick, clean and easy, no tools. These are usually 'proprietary design' by the particular manufacturer, which means other brands are not compatible.
This is not a negative aspect, as long as the manufacturer and/or the retailer are well established. These are usually in the 'high-end' price range, being specially designed and manufactured. Tubing and connections are usually 'quick-fit' too.

You should be aware that distillers are quite expensive to run, comparatively, as they use a lot of electricity.