I've just ordered a Cateye set, mainly because you can get all sorts of mounts to put them in proper places on the bike, rather than having to use silly rubber straps. I can put mounts on both bikes and swap the lights between them as required. USB rechargable so that's convenient.
That said, I'm not really a fan of lights for urban commuting. They're often far too bright with a silly beam pattern which just dazzles and confuses, doesn't make anyone safer, and they're unnecessary if you've got proper reflectors, which to my eye are more dynamic and better identify a cyclist and their position and direction.
So my advice is to get the dimmest light you can find, angle it so it's not dazzling and make sure you have decent reflectors on the bike.