My opinon is that tools should be bought from a hardware shop, as that is the only place you can get a good feel for the build quality.
The best ones that I have seen I have inherited from my father - they were his spare set which he bought about 30 years ago, the sort with the green/yellow clear plastic handles. There are imitations out there, but the good ones are quite expensive (as far as screwdrivers go) and the cheap ones are crud.