Well, that does not sound too bad after all!!
You are certainly planning to visit some interesting places as well.
In Verona, be sure to visit the Arena, it's fantastic, and for the romance, take a look at Juliet's balcony!
In Munich, the Nymphenburg Palace, on the outskirts of the city is beautiful, with lovely gardens, (plenty of 'scope' for romantic moments there!!)
It sounds like you might know Prague, but I'd say visit the Charles bridge - gorgeous, with lovely river views. Going up to the St Vitus Cathederal makes a very nice walk through some old parts of town. There are some Art Nouveau Hotels on Wenceslas Place that I would try and stay in, if I ever manage to go back there (not too sure where you'd park the bike though.
In Andorra, consider staying at Escaldes-Engordanay, this is the 'spa' town of Andorra, with several spa's for relaxing hot soaks and massages, just the job after long hours in the saddle!!
Barcelona is just great, the Gaudi architecture is worth studying, and take a trip up to Parc Guell. You can visit Nou Camp too for a tour, if you are 'footy' minded. You might be able to find a bar with some dancing in the Ramblas area, too!
I don't know the other places you are going to as well as the ones I have mentioned. I hope you both have a great time (and no saddle sores!!)