hootch

I'm thinking of picking up an 2005/2006 E55; I've been in several and they've always impressed and considering how the new E is coming out soon, prices have been dropping.

Are there any problems I should be aware of in these models? Common maintenance issues? Other miscellaneous suggestions for buying 05/06 E55s? What is the best I can get with my budget which is around 30K?

Thanks!