I have recently purchased GSA LC. 6ft tall, 82kg. Originally, idea was to tour on tar, hence I went for Adventure model which has larger screen and bigger tank. Eventually, I started doing off road as well and I am thinking of replacing It for standard GS. Just like racing, lighter means more performance. Stock GS has lower centre of gravity as well, it feels like a smaller bike although it's the same frame. Also, for serious off road, sand and mud, you will never want to ride with full tank, so high up. The whole "Adventure" think is smart marketing politics. BMW is happy if you trash their bike and get it fixed (parts) or replaced (sales) often.
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