An honest question - what do you mean by "real" bike?

What's most important? Speed? Comfort? Reliability? Company support? Options (racks, fenders, tire size, etc.)?

"True" (or stock) commuter bikes are nice, but they are usually decked out in fenders and stuff making them a bit heavy. They are great for utility, though. Straight up track oriented fixed gears are nice, but provide an aggressive, more aero dynamic body position, which many people don't like over long periods of times, especially for commuting purposes. Also, track bikes generally have a bigger gear ratio, so you'll be cranking harder unless you lighten that up a little with a new cog, chainring, or both. Also, some don't allow for wider or CX tires, so if you're going to be riding in snow, that may be a factor.

Personally, I'm impressed with some of the rigid 29er bikes out there (I have a MotoBecane Outcast, but I use mine for single track riding) because you can deck them out or strip them down and they have tire options from slick road tires to beefy MTB tires + mounts for racks and stuff. You can also get them with disc brakes and many have flip-flop hubs.