Best Biffy album? It's probably the biggest grower of an album I've ever had. It took me a year, but it's finally "clicked".
Also, on a slight tangent, is it just me who REALLY loves Only One Word Comes To Mind, and The Conversation Is...? They'd be in my top 5 Biffy songs, but I never see much love for them. The end section of the former is probably my favourite part of any song ever. And I mean that.