Swiss army knife is the GS by definition. Does everything well but master of none. That isn't a discredit as I'm on my third GS (1988 bumblebee R100GS, 1996 R1100GS, and now my 2005 R1200GS). The only problem on the standard GS, and mostly addressed on the GSA, is the buffeting around the head.
When BMW added the small winglet fairings, it made all the difference. It is a do all bike but will overlap 0% with an S1000RR. Oh, and by the way, they hold their value amazingly. Bought it for around $13k in 2004 and a 2005 sells used today with low mileage for $8-9k.
Hope this is helpful.
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