Purely from an IQ point of view, the best standard zoom lens in the range you're talking about, among all brands, is the Olympus 12-60.
However, I'm surprised you didn't even consider Pentax as an option.
In its class (semi-pro), the Pentax K5 is the smallest DSLR on the market. Combined with the Pentax 17-70 f/4 you have a terrific combo, in a very small package!
The 17-70 f/4 has the advantage of being a constant zoom (by opposition to the zooms in your list). It's also one of the lightest one.
Finally, in terms of pseudo-macro capability given its magnification ratio of 1:3.2 it's also the closest focusing one.
However, I'm surprised you didn't even consider Pentax as an option.
In its class (semi-pro), the Pentax K5 is the smallest DSLR on the market. Combined with the Pentax 17-70 f/4 you have a terrific combo, in a very small package!
The 17-70 f/4 has the advantage of being a constant zoom (by opposition to the zooms in your list). It's also one of the lightest one.
Finally, in terms of pseudo-macro capability given its magnification ratio of 1:3.2 it's also the closest focusing one.