memonroe, Welcome to the forum. You'll get a lot of advice about how aluminum frames are too stiff, with a race frame of steel or aluminum there is a lot of stiffnes, primarily because of the geometry. As said above that can be tamed with tire selection. I've ridden aluminum for nearly two decades and I prefer a 'large' 23C or a 25C tire run at about 100 PSI, sometimes less.

For me the biggest advantage of aluminum is the lack of bottom bracket flex. Yes, there are steel frames I couldn't flex the BB, but I discovered them after going with aluminum.

Brad