What's wrong with the Biria? It looks like a decent all round commuter type bike. You need full fenders for rain. It looks like you it has a rack and you could get panniers for the bike. How much riding at night riding do you plan to do? I think most people would recommend a hub with a dynamo for lighting system. Perhaps you could keep the bike you have, make a few upgrades and have a great all round bike.
Another recommendation would be to pick up a beater bike on Craigslist that you can use as a backup bike if you have no car. Bike shops are not exactly like auto repair shops; they don't always have your bike ready by the end of the day.