I have somewhere good but the name of it is at home. it was a business hotel. walking distance to marianplatz. the only thing is that it was next door to a sex shop if you had children. however, it was very reasonable and the hotel itself was fine - nice enough bar, bedroom, great views, bathroom was a bit tight. The location was excellent - walked everywhere - but we were on a budget of about €100.00 a night and we got the best hotel we could for that. Plus, we reckoned we would only be sleeping there anyway!
I'll give you the name and you can check it out anyway.
It's a fab city. You'll have a great time. We did a talking tour which left in the main train station (same group who do Dachau) and it was fab.
Also, drink to your hearts content with no hangover! fabulous!