You get what you pay for, and adding spacers to your set up must be done with absolutely safety in mind which is paramount.
However if you drive like Miss Daisy on her Sunday drive out for her weekly picnic then any old spacer will do the job if it is purely for cosmetic reasons.
I personally use and always recommend the tried and trusted Eibach range.
Remember if your spacer studs/nuts fail your wheels fall off, just saying.