Glen,
I am 5'11, 190lbs and without gear, and I am getting close to the big 50! Of course I really like the 200, At one time or another I have rode all of the GasGas 2 stroke line up. I have a chance to ride a 300 when ever my buddy and I get together for a ride. We very seldom switch bikes, he likes his electric motor in the 300 (lazy), and I like ride more aggresive....so the 200 works for me. By buddy is not a racer, however he has game and can wick it up when he choses. I myself have backed off on racing the last few years, but when I was racing cross country style events the 200 was right at home on the tight courses. When the courses opened up and there was longer hill climbs, or desert events it was a little harder to run with the 450's, which was the most common bike in my class.
I have never rode back on the east coast, and from what I've seen and heard about the terrain is much different than out west here. You guys have endless rock gardens, the tree's appear to be much tighter than out here and it looks like you have some elevation changes. IMHO, I think that 200 seems like a great bike for that type of terrain, meaning you can lug it around all day, or you can scream it when needed but have more down low when you need it on the rough stuff.
It is not a 250, so clutch works is required in some cases to loft the front wheel. I have not ridden a newer 200, so I have no idea what they are like, but I'd love to for a seat in the pants test with my old 99 200. The motor is the same, frame is different and so is the suspension.
I am always talking about wanting to get a newer bike. I have tossed around the idea of getting a "newer" YZ125 and converting it to a woods type machine, oversized tank, fly wheel weight, gearing, skid plate, suspension...you know the drill, but I am not sure if I'd be happy with the results..........In the mean time, I'll just keep my old 200