why not use http://www.kabeldeutschland.de/? their service is available in most rural areas and goes up to 100Mb/s. i am actually surprised the author doesn't even mention them...
Kabel Deutschland is throttling as well. Unity media just revealed that they dont have any plans to do so. They also off 128 mbit for 60 eur per month.
Unfortunately Kabel is not available in my region (south bavaria, west from munich)