The problem I find with all of these tools is that they seem to be relatively expensive for what they are!
At the same time, an awful lot of the cheaper sets, even from the better names, tend to be made in Taiwan, and none of them seem to be up to removing a T55 screw from a brake disc without twisting.
This really is one type of tool where you can't really economise too much for professional use!
So, what to do?
Well, the best 'bang for the buck' I reckon are the KoKen! There is good availabliity in all the drive sizes, including different lengths. They seem to put up with heavy use as much as, or better than, any other make, but cost considerably less! If you do manage to damage one, they will also just sell you the insert, which some makers will not!
The alternative, at least for the smaller sizes, is to buy a decent quality magnetic bit holder, from whoever your favoured maker is, and some decent quality bits! Most makers offer a 1/4 inch holder and bits, and some a 5/16 which can handle larger sizes!
Uniquely, Beta tools offer a 10mm bit holder in 1/2 inch drive thst takes their own 10mm bits! These are superb tools. The 10mm hex drive allows for a more rugged bit, all other factors being equal, and the bits are reasonably priced, both hex and torx being available!