A Virgin and a Whore! Followed by Chaotic Beauty. But I must admit I never heard Children of the Dark Waters. :I
It's an extremely tough choice between A Virgin And A Whore, Before The Bleeding Sun and Children Of The Dark Waters. They all sounds so different. What's good with AVAAW, is the soft and nice melodies, I love the soft and "cute" pianos. BTBS has Lost Rune Of Thunder. That song kick ass! COTDW, heavy and very epic. Like them all 3. I do enjoy Chaotic Beauty as well, but it's not as good as the other I mentioned. There's something with the piano I don't like, I think.. Bought it though Don't enjoy the older albums at all actually.
All I can ever get my hands on in the US is A Virgin and a Whore, which I own... So I voted with what I know