Well muzza the first and last are more road style bikes and the cross city 0 a mountain. You have to consider what you'll be using it for. The tire width goes up from 25 to 30 to 32mm which from first to last will make quite a difference in handling. If you're going to use the road almost exclusively I wouldn't even consider the cross city. Cross it off your list. But if you will be doing a proportion of your riding on narrow bike paths and some gravel tracks then it would be the best choice of the 3.

The bike paths here in Brisbane are narrow and I sometimes have to leave them to avoid pedestrians. I have to go into the grass, which is sometimes wet and sometimes boggy and I appreciate the traction and off-road agility a Hybrid mountain bike gives me. If you're mainly into cycling casually for exercise around the city then you won't suffer from buying a bike that is more mountain bike orientated. Later you can always change tires to smoother narrower ones if you like. But if you buy one more road orientated you will suffer on a lot of off-road surfaces. It might pay you at this point to look at a map of where you expect to ride, even drive a route or 2 in your car perhaps?

One question, why are you you looking at the 3-chain ring bikes? Do you perceive a need for ultra low gearing? The number of chain rings will make a big difference. If it was me I would want to sort out the gearing issue first and then move on to what bikes I like with that combination.
Hang in there.