Best canon lens option?

I'm about to buy a 60D. Before I had a D40 Nikon with 18-55mm and lately I've been using a EOS 3000 N (film) with a 28-90mm. It took me a while to decide for the 60D but now I need help deciding which lens. Among my picks top are:
18-55mm + 55-250mm
18-135mm (maybe after a few months i could get a 50mm prime)
18-200mm
I know the lower the zoom range the better the image quality its supposed to be, but how bad is the lens quality on the super zooms? Obviously having a lens with a wider zoom range is more handy than changing between lenses. Is there a big difference between the image quality of the 18-135mm an the 18-200mm? I wouldn't mind spending an extra buck if the 18-200mm has a better quality than the 18-135mm, and the extra zoom is not really necessary but it would sure be nice to have it. I will be taking all kinds of pictures.
PD: All of the lenses I'm considering are IS and EF-S
PD: Any insight is welcomed, including other lens options.

To start with I'd use the 28-90mm lens off the film camera.

Are you sure you want to switch from nikon to canon? If i were you I would stick with nikon.

(I'm a canon user, by the way)

the money you would spend on a new camera body would be better spent on a nicer nikon lens.

You can try reading the reviews for the various lenses you are interested in and see which one might be good (of course there will always be those occasional bad reviews, but if in general people seem to like a particular lens, it's a good gamble to get one).