Van Helsing is not too bad, there are some werewolves in there too.
and I don't know how you feel about foreign films, but Moon Child is fantastic, though it's less of a vampire move and more of a gangster film with a vampire twist.
me, i advise that u DONT watch twilight until u read the books because personally i thought the acting sucked and the book was 1 million times better i dont know much about movies but i have tons of vamp books i read and i love
For something different, try Nosferatu: Phantom der Nacht. It's a 1979 remake of the original Nosferatu. It is a lot like it, but it has dialogue. Yes, it's in German, but you can watch it in English too (but I never have so I don't know how it affects the movie). It's a "no frills" vampire movie and feels more like a documentary in some parts.
The man who plays Nosferatu is Klaus Kinski and he's truly a character...