I have one Korpiklaani album (which is ace in a beer chugging hell yeah way) but only heard bits of Sabaton. The new Turisas is on my 'to do' list.
I got the Varangian Way as a promo and it came in a DVD style box with some hilarious PR puffery and on the back it bears the legend "Someday the film will be made!". Brilliant!