RoadRider400
Some bloke that likes cycling alone
I can vouch for Carrera if you are going down that route, or at least vouch for the one I owned. Picked it up second hand for commuting in all weathers and performed very well. Get something cheap and cheerful for the commute. Less worry about it getting damaged when parked up at work and you will not feel obliged to clean it so often. Which is no fun after winter commutes in crap conditions.