Germany's economy is doing better than that of most of its continental cousins. Whether that stays the case by the time you graduate remains to be seen. Generally speaking, German business schools (including the ones you mentioned) are all solid, but not necessarily highly ranked in Europe. FT, for example, ranks the only three German b-schools in top 70 European schools. 3 out of 70 is either a bias by FT against Germany or a reflection of state of business education there.

You may be better off seeking an MBA in the UK, France, or Spain, if you want wider currency of your MBA. If you prefer Germany still, you will have good opportunities within Germany after your MBA.

Also consider University of Cologne in that list.

Hope that helps.