Snap on are great. I have them. Bought 20 years ago after snapping a craftsman. Look for models where the socket is designed to hold each individual size. Never buy sockets where the hex key necks down to fit the socket (craftsman). And don't buy the roll pin secured models, only press fit. Press fit are stronger, twist less.
Before spending $100+ on a set, make sure you can get replacement hex bits cheap or free (like Snap On) and that you have the means and inclination to replace these yourself. Otherwise, you should buy disposables like HF.
The keys here are:
1) you want strong, hard, crisp bit sockets. Snap On "gold" are super hi quality tool steel cad plated. These are dimensionally better than the standard black oxide because black oxide removes a tiny amount of the tool surface. Whereas cad does not.
2) Auto manufacturers use cap head screws in high torque and access restricted areas. In my experience, these are not screws to screw around with. If something goes wrong (you round the screw's Allen recess for example) the fix can be bad (like remove engine bad). My advice is to buy quality, and save your money elsewhere.
3) These tools wear and require replacement/refurbishment. Failure to do so can cause the stripping of the Allen recess, which is bad (see above). So buying Snap On or Proto or some funky euro tool that you can't easily get warrantied or replacement parts is a bad move. You MAY be better off with cheap new, rather than good worn.
4) espy is right. One set won't cut it. You really will need longs, mine are long ball ends since you can't really hang on any long Allen socket. I also have stubbies, which are helpful and super stiff. So factor in multiple sets (unfortunately).
5) substitute swivels for ball ends and we could say the exact same thing about torx bit sockets. When guys here talk about "complete socket sets" they are talking 6 and 12 pt. that's not a complete socket set in my opinion. If you want to work on cars, you need a fairly extensive set of bit sockets.