Water Treatment/Filtration and Affordable solution?

In the article Water Quality in the Outer Hebrides / Western Isles I raised the question "has the recent upgrade to our water supply been an improvement"? And I made mention that I have tested water filters and plan to test more. We have been using a number of jug filters for over a year now and could not live without them. However when we recently visited Woolworths to buy our replacement filters we were alarmed to find that they no longer stock them. I have been lucky in finding a place online where I can purchase them and other filtration systems. Here are a few of the highlights on offer at the moment:

Filter Jugs:

Replacement Cartridges:

Kenwood Universal Cartridges For Boots(tm) Filter Jug (6pk)
Kenwood Universal Cartridges For Brita(tm) Filter Jug (6pk)
Kenwood Universal Cartridges For Kenwood(tm) Jug (6 pk)
Kenwood Universal Cartridges For Waymaster(tm) Filter Jug (6pk)
Kenwood Universal Cartridges For Curver(tm) Filter Jug (6pk)
Kenwood Universal Cartridges For Aquastream(tm) Filter Jug (6pk)

 

More water treatment/filtration systems when I have had a chance to test them!