KYB are not too bad. Sachs are not too bad. I've used both and no problems.
Marelli or Meyle are presumably a little better (more expensive at least) but no experience, although a pair of Marelli bonnet struts I bought were very splendid quality.
NAPA are the cheapest, and I've never tried them... but some NAPA stuff I bought (can't remember what) didn't cause me problems that I can recall, so I dunno..
Ralf S.