If you have too much money to spend then the upcoming X6HRT (T standing for titanium) might be the right choice for you - and it might be a lot lighter than the quite heavy
X6 HRM (Metal).
For around 1000 € (or $) they already sell it at
http://www.outdoorgb.com/sshop/prod_info.asp?PID=12522
unfortunately no picture - but it looks a lot like the
observer titanium with 6-series design.
greetings
lobi