I'm looking at the Giant Roam 3 vs the Roam 2. The big difference is the hydraulic disc brakes. I rode the 3 and liked it alot. I didn't bother riding the Roam 2 because I assumed the discs were low end mechanicals and I gave those a try on another bike and didn't think much of them. I'm not sure why cantilevers seem to have disappeared, but I liked the canti's on my old MTB better than today's V-brakes.
Anyway, I'll be towing 1-2 kids and maybe hauling some gear on a rack, doing some errands and riding for fitness. I doubt I'll go farther than 10 miles round trip very often. I don't see alot of riding in the rain in my future and Denver tends to be pretty dry anyway. Just not sure if the Hydraulic's are worth the extra $100 and ~1-2lbs. Or should I just upgrade to Kool Stop pads on the Roam 3.
Are the hydro's really that much better - if you can lock the tire up does it really matter if you locked them with a disc or rim brake?
What's maintence like on Hydros?
Are lower end Hydro's reliable?