I agree with many here. I bought my GS on the way back from Baghdad moons ago...I was in the same situation you were in, shopping from a deployment.
Based on what you say, yes, a GSA may work best for you (though I like the GS more 'cause I'm short). I love the KTM but it is a more dedicated machine, meaning it's more like a sportbike on a dirtbike suspension, fast and very offroad capable.
Definitely check the used market constantly.