If you look at the V Strom I suggest the 1000 for what you want to do. I have the 650 and my wife and I travel 2 up all the time. I'm 190 and she's around 130 and loaded down with a weeks worth of gear it holds it's own but in the mountains there isn't a lot to spare. Also we came from a Goldwing too and your wife may not be happy with the seat. We went to a Russell Day Long seat and a Pirates lair backrest. Really helped my wifes attitude on longer trips but it also raised the seat height slightly.
I'd rather be knee deep in a creek pulling a rock out from underneath your bike. : My wife