the thing to remember is that all etchings are not created equal. Take MATCO for example. I'm not what they etch with but, on their chrome or impact sockets long after the red/blue/gold inks wears off, there is still a legible shadow of the size marking that is easy to read.
I also vote for SUNEX impact sockets because they are relatively low priced for a quality tool and unlike Grey Pneumatic and others, they also have the size stamped into the socket in addition to the gold etching.
Gearwrench also does this on most of their impact sockets too.
