@Workhorse regarding aero v. all around: Aero bikes these days are pretty good all arounds and all arounds are pretty aero. The difference in grams of watts saved by an aero bike, while black and white in a wind tunnel, will be hardly noticeable on the road (IME). The lighter all around bikes, while mathematically proven to get you to the top “10 seconds faster” doesn’t matter if you have no idea how to pace.
Comfort is king (this assumes correct fit). Any reputable manufacturer these days is making everything stiff enough for most riders. Maybe too stiff. If a bike isn’t comfortable and doesn’t handle well who cares how aero or light it is? Between the manufacturers the geometry are very very close. Whatever you get try and make sure it handles and is comfortable. How you know that until you ride it for a few hundred miles I don’t know. So, perhaps don’t get caught up in the marketing hype.
The new Allez probably performs every bit as good as a Tarmac for a fraction of the cost. I’d recommend not buying top shelf anything and use the saved $ (if possible) and spend more on bars, saddle, wheels and nice tires and killer shoes.