Trek Madone 5.5

Allbarnunn
Allbarnunn Posts: 2
edited January 2014 in Road general
I've a lovely 2008 model as a summer bike with mainly Dura Ace components, and Mavic Kyrsium wheels. I would appreciate any help and advice as to what componentary I should be replacing or upgrading. Are there that much better bikes worth spending another £3k on?

Many thanks