^Good suggestions. The Trek and the Specialized should both be available in local bike shops. Ride both. I think the frame comfort is where you are going to notice the biggest difference over the steel. The roubaix (over a steel frame) is going to feel like a carpet ride. I can't speak for the trek/ haven't tried that.
The domaine (iirc) can take some pretty wide tires. Enough to deal with any chip seal, and light gravel.
The specialized probably can too- at least much wider tires than mid 90's road frames.
*If* you have some gravel roads near where you live, also might want to try out a checkpoint and a diverge. These things are a hoot, and get you off the roads without the dangers of full on MTB. I think as traffic ramps back up, road riding might get busy again.
Congrats on your new disc brake bike.
Embrace the borg. You have been assimilated. I resisted with all my might, but they work fine, and have been a non issue. I bought the diverge, and with a second road wheelset, would use it as my road bike. I ride around with 37c slicks. They can take pretty much anything within reason. For road riding, I ride my bmc or tarmac, but only because they are right at hand.
Been too busy grinning to look back.
As a guy who has two fondreist- when you ge the new bike. Go sell the fondreist.
