Hello, I bought my used 2005, 3 liter, sport package Z4 a few months ago. I'm glad to find this forum so I can finally communicate about this wonderful car. I couldn't be happier about owning it so far. I find the longer I own it, the more I like it. I'm in norheast Ohio. Many many years ago I owned a Triumph TR7 and before that an Opel GT. Those were my only sports cars. I currently own a Kawasaki ZZR1200 sport/tourer bike that is a ton of fun too. Anyway, hello to all and I'm sure I'll be talking to ya soon. 
