Are you sure that Fire XC Pro are from Schwalbe? Google shows Panaracer and the Panaracer site gives no indication of them being meant for winter. I would worry about them slipping on ice.
Yes, sorry. Should've been Panaracer. I will fix that, thanks.
I've been perusing the pictures of people's winter bikes both here and on other forums and the Panaracers have been mentioned several times. The Fire XC seem to be somewhat popular but I've also heard good things about the Conti's.