It's generally more about features than IQ, especially with an older body like the G3. (I'm assuming "3G" was a typo.)
Since the 14-140mm has the longest range, it's generally a better "walk around" lens. It's also well suited to video, if that matters to you. (Full disclosure: I own two of the original version/model.)
The 45-200mm is the largest and heaviest of the other three, but it's the only one that has an OIS switch and the only one that goes to 200mm, so if that's what you need...
The main difference between the remaining 45-150mm and 45-175mm (which is an "X" lens, BTW), is that the 45-175mm is a "power zoom" (motorized via a switch, as opposed to mechanical "by hand") and zooms internally.
Are the "X" lens including the 45-100 worth the extra
If you mean the 35-100mm, it depends on whether or not you need constant f2.8 aperture. (Full disclosure: I also own a copy of this lens.)
P.S. if you don't need shorter than 100mm, Panasonic also has a 100-300mm.
P.P.S. You can also use Olympus micro 4/3 lenses on a G3 (or any other Panasonic m4/3 body) but most Oly lenses lack Optical (in lens) Image Stabilization (OIS) because Olympus cameras have In Body Image Stabilization (IBIS) which is obviously built into the camera body, not the lens.