I am looking in particular at the Z6. Not sure I can swing the Z5, so I'll probably just upgrade the FD at first on the 6. Tried searching a bit and didn't find a whole lot. LBS gave me a price of $1499.99 for the Z6 and $1879.99 on the Z5. The big bonus at that LBS is the lifetime service for the bike. Don't hear of that too often, at least where I'm from. And hey, my Garmin Slipstream (my favorite team) rides them. What's not to like? I know Tiagra isn't the best but I more than likely will upgrade to Rival next year. Just can't swing a huge price right now.