I use www.365chess.com. Not perfect but best that I have found. If you regiser (it's free) you have no limits.
Which is a good website to learn openings
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Browsing database and reading some articles about the openings are different things. 365.chess.com is good database site, but I assume that, since the OP is paying member, base here should be equally good (if not better). As for a reading, there should be a plenty articles available here, just search the articles. Pelikan is nowadays more known as Sveshikov so you might also try it as a key word in search.
Openings database at Chess.com is not user-friendly. For instance, I wanted to read about Sicilian Pelikan variation, and I wasn't able to search for it successfully. Which is a good website to learn chess openings?