Your dealing with three things here... Sockets, ratchet, wrenches. While you would think it's best to divide your budget by 3 for each one, I disagree.
Sockets... You don't feel them, they just sit there and as long as they are made in spec, they will suffice. Save as much money here for the other two. Get harbor freight sockets for all it matters. I use them professionally on trucks. Deep, shallow, and 12pt.
Ratchets... Do the real work. Never owned a German ratchet, but based on pictures, specs, and reviews I would say North American style is where it's at. I avoid snap on as I think most of their stuff is overpriced, but a 3/8 ratchet is very nice. If you don't want to drop that kind of money, Gearwrench 120xp is pretty cutting edge tech and amazing. I own and recommend both.
Wrenches... Something you hold and feel. Cheap open ends stretch. Here the Germans excel. I own the hazet 600na line. I paid about 240 for a complete set from 1/4 to 1" and they are nice... But not that nice. Only reason I bought them was they are the only German maker who still sells SAE long pattern wrenches. I also bought a Stahlwille 15 piece metric set for 130$ on promo. I don't even need metrics (have s.o. aka over rated) but for that price why not. The quality is equal, (very different design though) but almost 1/2 the price. Maybe see if that deal from tbs aachen is still on. I'd also consider Elora for $100 a set on eBay.
Off topic, but I don't agree... If you really think those sizes will suffice for those decade old cars in that pic, your wrong. (unless your the only person to ever service that car, and I doubt that from your post. Dealer doesn't count) Asian and euro cars tend to use the same bolt threads. However, their head standard sizes vary. Say a shop is changing your control arm and the 14mm bolt snaps. We tech's will reach into our magical bin of used bolts. Now you will end up with 13, 16, and 18mm bolts substitutions for Japanese bolts. Unless your in the desert, bolts rust and strip so you'll have to make do with a 9mm (or better yet 3/8 aka 9.5mm) on, say, a damaged 10mm. Get the complete set from 7mm-22. Get a cheap sae set too as you never know what's been drilled out and replaced with **** bolts.
tl;dr... Germans make great wrenches. There are comprable ones to hazet for half the price. Don't skip sizes.
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