Well, to give my 2 cents in on the real topic (sorry if I got off topic there), I think it just depends on what you are going to use it for. A nice aluminum frame with a carbon fork will treat you right. However, I had a flimsy aluminum bike at one time (Fuji). I tend to ride less-than-perfect road conditions (the LBS would cringe when I told them where I was riding). To be honest, I did not feel safe at all on that aluminum bike, and I was only going 25 - 30 downhill. At times, I thought my headtube was going to snap off from some of the bumps. I ride that same road now with my steel rig and I don't even think twice about it. However, the steel bike I ride (Surly Pacer) is a heavier-set steel frameset and it is designed for such riding.

So my opinion is that if you plan on doing some fast riding on good roads, the aluminum with carbon fork should treat you well. But I'd suggest not getting rid of your steel rig right away. You may want it back.