Most german pinot noir that I have had was thin and grapey...almost like juice. It is sold in vast quantities in germany for about EUR4 a bottle.
However, some winemakers aspire to greater things. Meyer-Näkel (Ahr) have their sights aimed high, producing highly extracted, new-world style pinot noir for about EUR30-45 a bottle. They even have a Martinelli-style lable, gold on black, which is unheard of in Germany. I do not really like this style of pinot noir, but some people I know rave about their wines.
The other "high end" German pinot noir producer is Dr. Heger in Baden.
The following others have good spätburgunder reputations: Bercher (Baden), Johner (Baden), Huber (Baden), Salwey (Baden), SchneiderLingenfelder (Pfalz), Meßmer (Pfalz), Gunter Künstler (Rheingau).
I have not had any of their reds; I only know them by reputation.
If you are seriously interested in all kinds of German wines, get the Gault-Millau guide. It is only available in German, but has easy-to-understand rankings of all larger producers, including those of red wines and non-Riesling whites.
John Trombley, an American critic of German wines, discusses the influence of the guide
here.