The labels you are looking for will largely be determined by the type of music or specific artist you are looking for. (i.e.- Don't look for an ECM pressing of Boston or any other rock artists.) Alot of the smaller record companies do a better job of pressing, while the larger companies crank it out too fast, athough there are lots of exceptions in both cases. Check album reviews and ask around about specific albums.
As suggested above, you could also get a table in which you can't discern a good pressing from bad, in which case, your problem is solved.....
BTW- I have alot of import/european rock I'd like to sell. If you're interested, let me know.
Regards
Jim