Europe's my biggest favorite band ever. I've got all their CD's and DVD's, as well as several vinyl singles and LP's. I've been to three concerts.
They reunited in 2003 and have released two albums since then, "Start from the Dark" and "Secret Society". These are more heavy rock albums, so it's nothing like "The Final Countdown". "Start from the Dark" is a heavy album, while "Secret Society" is a bit more varied, so I would recommend "Secret Society".
Out of their older albums, "Wings of Tomorrow" is also on the heavy side, but if you like 80's rock with keyboard riffs, "The Final Countdown" and "Out of This World" are worth a listen.
As for their DVD's, I'd recommend "Live from the Dark" (a gig shot in London 2004), or if you want a concert from their 80's heyday, check out "The Final Countdown Tour: Live in Sweden".