Greetings from Idaho!
I bought my DX in January from ACES in FT Collins (ask for Bradley
) and will have a '16 R1200GS for sale in the next couple of weeks. The GS is a great bike but, like you, I wanted something lighter and more nimble to explore the trails out West.
I knew when I bought the DX I would need to address the wind challenges, which are made even more challenging coming from the larger, aftermarket windscreen on the GS. Experimentation continues.
Otherwise, I 100% do not miss the GS. Put 200 miles on the DX Wednesday - about 50 were on flowy gravel roads - and I love it! Plenty of power, the handling is fantastic and the bike feels much lighter than the stated 500 lbs. Looking forward to more aggressive offroading this Spring.