Never heard of Enrgtech - Farnell is very well established. Likewise RS Components, Rapid Electronics, Mouser, Digikey etc etc etc.... there are also some very good 'independents' and specialist suppliers. In my experience (and I have LOADS) there is no such thing as a single source supplier - you HAVE to shop around.
There are too many others to make a single supplier your 'only' source - shopping around is the name of the game. If you want 'standard' (leaded) components there are loads of places to go and determining one from the next is purely personal opinion.
If you are truly anal about getting parts you can use this website - basically a one-stop place for 'everything':
https://octopart.com/
Not sure if Enrgtech feature there though.....