So much to say, and so little space..!
First off, you’re going to get some very conflicting advice here - everything from “buy all Snap On” through to “buy all Harbor Freight”.
Secondly, appreciate that there are dozens, if not hundreds, of tool manufacturers apart from Snap On, Mac and Matco. Very few of them offer the range of tools that those three do, and in fact even they struggle to make more than a fraction of their tools in house.
So, that’s the first bit of advice - you always get the best value by buying a tool from the actual manufacturer. The worst value is buying a tool that’s been rebranded. Here’s an example. Prices are in £ due my location, but same applies anywhere.
A Snap On 10mm Flank Drive Plus is about £40. Although I have a good deal of Snap On (and love it) I didn’t pay these prices, and that’s too much. With your discount that’s about £20, and that’s better. It’s still “all the money”, but Snap On wrenches are about the best out there.
Mac offer their RBRT. I don’t know what these are priced at, but I’m thinking that 10mm has got to be say £30. With a discount, £15. Seems good value. Or is it…? You see, these wrenches are not really “Mac” wrenches, they were a Facom design originally, and are available with a lot of names on. They’re also made in Taiwan, so while the wrench might be “almost as good” as the Snap On, there’s no need to pay “almost as much”.
And you don’t have to - here’s the same wrench with the USAG name on for £6.
So, my advice is to shop around, mix and match, and don’t get everything from one source, which I think was your intention anyway.
As to specific names, assuming you are in the U.S.A, consider the following-
Sockets and Accessories
The best - Snap On or Nepros. You will use these a lot, so with a discount I’d get some Snap On. Certainly the smaller drive sizes.
Pretty decent - KoKen. Wright tool, Proto, Williams (if US made - some isn’t). I’d include the better German makers here too, such as Hazet. But beware, for some tools (e.g hex bit sockets) Hazet or KoKen are the best.
Perfectly acceptable - any of the better Taiwan tools - Tekton is probably a good default here.
Wrenches
Pretty much the same. Snap On and Nepros at the top. Big wrenches cost big money new, but hardly wear, so if you can get used, consider it.
Next level - Wright, Hazet, Stahlwille. Wright probably offer the best value for you.
The better Taiwanese probably the minimum acceptable.
Screwdrivers - Vessel (Japan), Witte (Germany), Facom (France), Heyco (Germany) all offer top quality at a fraction of truck brand cost (in fact Matco rebrand Witte). U.S. made Williams, with the black hard handles, are very similar to Snap On but much cheaper.
Pliers - Channellock are good solid U.S made tools. Knipex are nice, but don’t over pay. Tsunoda from Japan are superb value at present.
Hammers - buy U.S. made - Estwing, Proto, or Vaughan. Trusty Cook for dead blows.
Punches - Mayhew Pro are excellent, and manufacture for Snap On anyway.
Pry Bars - Wilde
Hex Keys - Bondhus or Eklind
Finally, if in doubt, don’t buy from the truck because you know no different. Try looking at a good online retailer who stocks different makes. Harry J Epstein would be a good option - lots of choices, almost all “safe bets”, but very reasonable prices.