Bayern are one of the teams that often play friendlies in North America so you might get the chance to see Davies play for them in Canada one day!
I've been to about 50 English grounds, including the majority of the big teams, and most of the top European ones. Real Madrid's Bernabeu is the best stadium I've seen a game at, but Bayern's Allianz Arena is easily in my top ten.
The biggest gaps I want to fill are Newcastle's stadium, Ajax (haven't seen them live either), Benfica's Estadio de Luz, and Celtic. I'd also love to go to the Maracana in Brazil and Boca Juniors' La Bombonera, but I'm not sure that I'll ever get the chance to go to Rio or Buenos Aires.