Best sounding LP's

I'm new to analog, and discovering that LP's, like CD's, are definitely not created equal in terms of sound quality. I've bought some used classical LP's, including a recent Deutche Gramaphone (sp?) recording that sounded really great and I realized how bad the others were after that.

Is there a web site that rates records for their recording quality? CD's also for that matter. If there's not one, somebody should start one. For me with classical, sound quality is paramount. How do you guys decide what to buy?