John,
The humidity is high here as well, but not as high. For me, when the temps hit the high 80's and above, the Llano is too hot when I'm climbing and there is no wind. It does wick, but with no wind and high humidity, I do stay damp when exerting myself.
They are currently working on something you're looking for. I am actually testing it right now. I can't say too much at this point in time, but I can say it's cooler than the current Llano. It's going to be part of their hot weather apparel. If all goes well, First Lite will should be releasing the start of this product line by February.