Even as a huge fan of Wire, Mekons and Gang of Four, somehow I'd missed out on Au Pairs until I bought 'Stepping Out of Line' as a blind purchase. It's turned out to be my favorite music pick up of the year so far. It's hard to believe they aren't better known, considering they are accessible, energetic, technically proficient, have a strong lead singer, but still have a distinct style and point of view. Now that I know their music, I wouldn't mistake them for any other band. Thirty years on, they sound fresh.
TL;DR - Fucking bad ass, get it!