I've never liked the LHT discrimination against those of us with less height. I kind of understand why they do it, but I don't like it.

There are some nice things about 26" wheels, but most of the biggest advantage, I think, is quicker accelaration, which seem to be counter to the touring bike mindset. Bigger wheels roll over things with less impact to the rider, which is why mountain bikes are going the 29er direction and is another reason I don't think 26" wheels make sense on a touring bike. Even so, the big negative, in my mind, for 26" wheels on an LHT for commuting is that the choice of quality slick tires is limited. There are a few really good choices (the Schwalbe Marathon Supreme, for instance), but not as many choices as you'd have with 700c wheels. On the other hand, the 26" LHT's can take wider tires.

Disc brakes? I think they're really nice for riding in the rain, both because of stopping reliability and (more importantly) reduced rim wear. You spend a bit more on brake pads, but it's still a nearly neglible expense. I am not a fan of the cheaper mechanical disc brake sets, such as the Avid BB5, but the Avid BB7's are great and not a very expensive upgrade.

You really can't go wrong with any of the bikes in your price range if you get one that fits.

Have you looked at the Kona Sutra or Salsa Vaya? I hate to add a bikes to an already long list, but it seems like you're early in the process and I like these two.