FWIW I reckon that for most people, spending big money on top quality tools is unnecessary, the main exception being things with moving parts, like adjustable spanners (which the purists would spurn in any case). Of course it's *nice* to have the best...but it costs. And you're buying quality that's been made to meet the needs of professionals - people who are going to be using them all day, every day. I use spanners I got off
ebay, and they've been absolutely fine for years - but then I only use them a handful of times a year. Same for screwdrivers, chain whips, pliers. Exceptions include spoke keys - Park Tools every time...cheap ones round off yer nipples oo-er matron; chain link removers - cheap ones break, and/or have too much 'give' to work cleanly; and cable cutters - cheap ones always leave one or two strands unsevered, and that's when the fun begins. But anyone who insists on a quality hammer, say, is a pompous ass. It's not precision engineering, it's a lump of metal on a stick.