I have a 2008 700 Switchback 136, I like the longer track on trails, it does eat up the bumps a little better than the 121. It won't be much different unless you are trying to be the first guy through the twisties all the time, and even then, you'll be right there.
If you do go for this, be sure the throttle body adapter has been changed, or do it yourself (~$65 part). They were prone to failing causing a lean burn down on those 700's.
