How do you like that EF-S18-200mm? Pretty good quality?
I've been considering getting an equal lens for a full frame, something like a 28-300. In the past, however, I usually avoided such lenses just because the all-in-ones typically don't provide the quality like the less ranged ones, such as a 18-50mm, or a 70-200mm, especially with low apertures like 2.8. I'm a particular fan of big apertures, but this one wouldn't be bad, in my mind, as a good, all-purpose walkaround lens.