Venus,
I, too, have a 5200 Trek WSD which I treasure. I know what you mean concerning fit. I, too, find a WSD bike to be the best fit for me. Anyway, I can't tell you anything about the GF bikes, having never owned one. But I do have a Trek 6500 WSD mtb. (Comparable modell now is the 6700.) Again, the fit is what I want. I feel like I am riding the bike, not like it is taking me for a ride.
I tried a coule other bikes, but came back to the 6500 because it felt the best. It's certainly not a high-end bike...............I don't ride off-road enough to justify getting a better one (yet - who knows what the future holds!) but it's comfortable, it fits me, and other than the weight, I love it. I've never had any problems with it. I consider it a great starter bike for going off-road. If I ever got more serious about off-road I would probably want something better, but 'til then, it's enough bike to keep me happy. Just was out on it today, in fact, and I am still smiling.
Good luck with your choice. I hope you are able to find something just right for you!
annie
Time is a companion that goes with us on a journey. It reminds us to cherish each moment, because it will never come again. What we leave behind is not as important as how we have lived." Captain Jean Luc Picard