IMO, hub choice depends on what kind of touring(?) you are going to do with the bike. If it's anywhere outside of the US, stick with Shimano, as you can get replacement parts practically anywhere. As far as generator hubs, Schmidt is the gold standard, but Shutter Precision work very well, too (and the higher-end Shimano hubs are no slouches, either)...front hubs are under much less stress, so you have wiggle room there. Spokes could be anything from DT Comp/Sapim Race, to more exotic combos--Sapim Strong RH, Sapim Force LH (rear wheel, of course), or from the DT catalog, Alpine III RH, Comps LH. The different spoke diameters help keep the tensions closer to equal with modern, high-dish hubs.
I was going to suggest you take a look at DT TK 540s for the rims, and live with the slightly narrower width in exchange for being able to use tubeless tires...but it looks like they stopped producing it in 26" form...unless it's a 700 touring bike, in which case, don't even think, just get the DTs. With Schwalbe making their Marathons available in tubeless forms, it's a no-brainer, now. I would personally avoid the Ryde rims, anyhow; they look good on paper, but if the profile is accurate, those look like two huge stress-risers formed right into the brake track. Maybe they did it under the auspices of a rim-wear indicator, but something about it rubs me the wrong way. I'm not an engineer, and can't quantify my feelings, but I'd pass.
Again, my opinion, but for touring, there is no reason not to use wide-profile cantilevers unless your heels hit the brakes...and I would hope they don't on a bike that was made for you.