It's strange how people low the high revving engines on trail bikes, i.e. put R1200S engine on GS?
Buy the Benelli Tre-X then! The 120+bhp I4 screamer put on the TDM-style frame.
I prefer the very essence of that big trail bike should be: the tractor-style pulling from idle rpms, making the fantastic traction you really can feel with your back side hammering it on the loose surfaces, nothing beats the lower compression R-GS boxer twin in this field at similar CC bikes i've tried.
Really don't like some high revving fekard that starts to breathe post 3-5K+ rpms, having a narrow powerband only in the mid-high to high revs, intense 2-smoker like gearchange needed to put that narrow powerband on the road, for me that is unridable in the offroad conditions i do (gravel mainly) and uncomfortible to ride in everyday communiting conditions where i'm lazy to change gears. I prefer the "diesel" pulling power.
I really prefer the engine having widely focused power band from idle to mid that the trailes have. Top end has very little meaning for me other than a smooth straight tar road where i previously redlined my sportsbike but it got really boring in time and I moved over to a boxer GS. For only the "straight" tar road there are always better bikes than a big trailies like the GS. So these guys who bash the engine not being like a R1200S really are a "fashion victims" that bought a GS that simply isn't the bike for them in the reality. They just miss the point IMHO.