FYI: I don't generally like handlebar bags, particularly with a lot of weight in them. The mass at the handlebars makes the handling feel sluggish. Personally I prefer a rear rack and rack trunk or panniers for commuting. It doesn't seem to change the handling of the bike as much. Some rear racks are "quick release" you you can easily pull the rack when you don't want it.

YMMV, but I thought it would be worth mentioning.