Radio 5 its one of the national public broadcast, you can hear it here:
http://www.rtve.es/radio/radio5/

their pronuntiation is pretty good

Buenas tarde, en primer lugar mucha suerte con tus estudios.
Second if you don't undertsand something that I'm telling you in spanish, feel free to ask me to repeat in english ;)
Tercero, un par de consejos, recuerda los simbolos de exclamación e interrogación se abren y cierran "¿?" "¡!" recuerda las tildes son importantísimas y que en algunos casos pueden cambiar completamente el significado de una frase.

Por último tu petición cultural.

Libros:
Desgraciadamente no hay buenos libros modernos en español pero sí clásicos.
"El conde lucanor" <--recomendación personal
"El lazarillo de tormes" <---old spanish languaje, really hard for you but you can learn how we (the spanish) are.

Peliculas:
Tenemos un cine horrendo que se mantiene gracias a subvenciones. No obstante puedo recomendarte:
"Celda 211"
"EL laberinto del fauno"
"8 apellidos vascos/catalanes"
"El bola"
"manolito gafotas"
"Mortadelo y filemon" <--- from the most iconic and international spanish comic

Series:
"aquí no hay quién viva" <--- en internet pilló un buen renombre esta serie, eso sí acentos muy marcados que se te pueden hacer muy difíciles y humor muy español.

Grupos de Musica:
La mejor música es antigua.
"La oreja de Van gogh"
"ella baila sola"
"monica naranjo"
"shakira"
"el canto del loco"

Estas recomendaciones tienen un mínimo de calidad y unas letras que podrías terminar entiendo fácilmente.

Radios:
"m80 radio"
"Kiss FM"
"los 40 principales"
"Europa FM"

ojo: las radios españolas ponen de todo tipo de música internacional. Lo que sí te puede resultar muy útil son los programas de humor de por la mañana. 6am-11am.

Un saludo. o/

It's a language I don't find appealing, so I never considered learning it for real, but if I were to search for flashcards, I'd probably look on memrise.com, as its system works for me best when it goes to learning vocabulary.
Good luck with your studying ^__^

Watch out for different Spanish because, even if it is the same language, some words and expressions will change from one country to another and the main difference will be between the Spanish from Spain and the Spanish from Latin America. From Latin America you may like the Spanish spoken in Colombia or Venezuela as they have a more "neutral" pronunciation, if you don't care about that you should consider the Spanish from México or Argentina.

Films:

• REC
• REC 2
• REC 3: Genesis
• REC 4: Apocalypse
• Sleep Dealer

Edit: If you listen to industrial at all, Hocico sings in Spanish and in English.

Books:

The Liliana Bodoc's Trilogy: Los días del Venado, Los días de la Sombra and Los días del fuego (if you like fantasy)
Horacio Quiroga short stories (if you like creepy Poe-like stuff)
Jorge Luis Borges short stories (if you like cerebral and convoluted stuff)
Mafalda (comic, like peanuts)

Music:

I recommend Pedro Aznar, that has very clean pronunciation (It's latinamerican spanish)

Movies:

El Secreto de sus Ojos (noir)
El Laberinto del Fauno (dark fantasy)
El Milagro de P. Tinto (comedy)

El Orfanato and Los Cronocrímenes (movies). That's all I have.
Oh, there's this too (music).

Forget TV, it's a real crap.

💩

I don't know if anyone has mentioned it yet but there's a decent historical drama series called Isabella about Queen Isabella I of Castille( aka the one who financed Christopher Columbus' voyages) and you can probably find the whole series online hint,hint.Wiki page

Plata O Plomo?

I'm mainly interested in ones that are in European Spanish

Oh ... okay ._.