A Nuclear Blast themed pin would be awesome, there's some great bands on that label.
-Opeth
-Meshuggah
-Testament
-Symphony X
Although if we're gonna talk bands that make sense, I'd LOVE a Rush themed pin. That was the first band that I saw live and really got me into music. Either way, that Blast Beast statue looks cool, I'm sure whatever pin comes out it'll have a cool design!