I tend to agree about the troll, but I'm biased toward Surly in any case, and the troll is pretty much my #1 choice for a conventional touring bike.

That said, you said you'd get the trek for 860, but the troll for 300-400 for the frameset? So I'm assuming the Trek is a complete bike. I would want to get a good estimate of what the troll is going to cost for a complete build, so I could compare apples to apples price-wise if that's one of your deciding factors. Building up a frameset is usually quite a bit more expensive than buying a complete bike with comparable components, unless you're transferring parts over that you already own.