I am of an age that prefers paper to screens - what if the boat electrics earth falls off and all the electrics go? And the battery in your hand held GPS is flat. One has to have some sort of paper although I can detect a deterioration in my own traditional navigational skills as I rely more and more on the chart plotter. I confess that because it is so much more convenient than rolls and rolls of paper, I do have the Navionics charts on my computer at home - for winter dreaming and planning! Of course, paper is so much nicer to handle both at the chart table and in the cockpit, but it is expensive - at least the Admiralty charts that I have bought over the years are. But you don't these days have to have a huge collection of standard charts of the sort used on merchant ships, but rather the folio packs which cover the main cruising areas around the UK - you need SC5611, from Kintyre to Ardnamurchan (West Coast of Scotland) which covers almost all the anchorages on this website. I am not an Imray Charts person for no very good reason other than I started off with Admiralty charts and like my bank haven't changed my habits (at least not until I left RBS in disgust and moved to the Coop following the financial crisis in 2009).
You may also like to look at Antares Charts "a source of 'unofficial' very large scale electronic charts and related pilotage information created by unqualified enthusiasts". The idea is to produce very large scale electronic charts of places which may have not been surveyed for years, particularly the more interesting anchorages.
As for maps, you can't do better than buy the Ordnance Survey maps of the area - brilliant.
I have included a link to the on line Bing maps on the home page. Handy but not as good as paper maps.