If your commute is longer than a mile or two, you will probably regret getting a Breezer, especially since you like the feel of a road bike. Breezer's are great bikes. And if you like to slowly toodle your way to work, they may be perfect for your needs (I am not being sarcastic, I realize that some people enjoy nice, slow rides).
I can't speak to the Ibex, but keep enough in your budget to buy the necessary extras like repair kits, extra tubes, rain gear, lighting, etc. A fully equipped $300 bike will probably serve you better than a $600 bike by itself.