Water can very much be an important addition to a whisky and I would say I add to pretty much most of mine. Having the water slightly tepid can really bring out the flavours that are hidden if the water is too cold. But it depends on the whisky IMO, and of course personal preference and circumstances.
If you are on a budget and not sure what to go for don’t overlook malts like the Tesco and Co Op own brand Highland and Speyside Singles. These are excellent and are in some cases considerably better than the more heavily discounted Gucci brands. For a west coast that won’t blow your head off like a Laphroig, i’d check out Tobermory, very nice drinking, smooth and sweet.
Currently I am working my way through a Balvenie 14yo Caribeann Cask which at £50 quid a bottle is a bit disappointing next to my favourite Aberlour 10yo that you can normally pick up for £25 or so. Every day’s a school day with whisky 😀