Originally Posted by SesameCrunch
You probably already know this, but the rear suspension on the FS would decrease pedalling efficiency quite a bit. If going fast is important to you, then this might be a concern.
I have the DT VIII FS (I think that's what it is) and I don't notice the rear suspension in terms of pedaling efficiency loss unlike my FS mountain bike (and I also have the comparison to my road bikes). The suspension fork however is not very good. It bounces a lot when standing up.