https://www.bikeforums.net/classic-v...ce-thread.html
There is the aforementioned thread.
I second the recommendation for Paselas. They are pretty decent.
Another idea would be to keep your eyes open on CL etc. for a nice set of 700c wheels (assuming they would fit your frame, and they usually do). You didn't say much about the frame or your current wheelset, but a good set of properly tensioned wheels with excellent tires makes a big improvement in ride quality. Probably bigger than anything else you could do to the bike. And while there are plenty of decent 27" tires, there don't seem to be any that are truly on par with the best that you can get in 700c.