i currently own the 2008 deore LX M580 rapidfire shifters and i love the way the 2-way release works, i dont have any complaint whit these part but resently i saw the new 2008 XT m770 shifter and it looks good.
is there any real diference between these two ?? am i gonna notice the difference if i make the change?? on the shimano site says that the xt has something called instant release .how does it work?? is that instant release reason enough to make the change??