You do realize the TdF riders fly down mountains in the rain at high speeds without crashing on 23's? The 28+mm tires on most hybrids won't have any issues.

Kim:hydros require much less regular maintenance than any cable brakes,and discs not only do better in bad weather,but don't wear your rims down,don't need perfectly true wheels for maximum effect,and the pads last longer. As for suspension;that's up to how you'll ride. If you plan on doing any off roading,than suspension will be nice,if you're staying on the road,you can do without.