You might add your price range, luggage size. When you say great road bike does that mean light weight, no suspension, smooth pavement, excellent climbing, large number of gears?
If your great road bike is steel, consider having it "hacked" (in two), sandsmachine.com
2000 Montague CX, I do not recommend it, but still ride it.
Strida 3, I recommend it for rides < 10mi wo steep hills.
2006 Rowbike 720 Sport, I recommend it as an exercise bike.
1996 Birdy, Recommend.
Wieleder CARiBIKE (folding), decent frame.