I suppose Bayreuth could be even nearer to you than Nürnberg;)
More than distance I thought about train connection. I mean there is direct train to Nürnberg and it's comfortable. Well I don't think that getting to Bayreuth will be some extra difficult, just Nürnberg would be nicer:)
Well I'll try to mail Eventim and find out, if they send tickets out of Germany.