Depends on whether the spanners will be used regularly, or only on odd occasions.
Britool are good, and Draper are not bad. Halfords do quality sets which I would say are as good as Britool. I do have a few Snap-On spanners, and yes, although excellent quality they do come at a cost.
Thirty-odd years ago, when I did all my own car repairs, I bought two sets of sockets (one set for me and one for my S-I-L). They were in orange-coloured steel boxes, and I think they were Draper. Neither of us has ever had a socket or any of the drive components fail on us to date.