Thank you so much for your kind and thoughtful reply. Yes, a visit would definitely be in order should he become a serious candidate for the position.
I've read a lot that Western Germany is more tolerant, so I'm glad to hear you confirm that. The size of Aachen worried me a bit but then I realised that it's bigger than the town I'm currently living in, LOL! and I was indeed reassured when I saw that university is located there - something that's missing here. Now, I just have to check Wunderground for Aachen's weather history. ;-)
Thanks again for the reply, I really appreciate it!