F600 vs X10 - travel camera
Camera choice is a personal decision and not every camera fits every person. With that said, I think the X10 would be an ideal travel camera for ME. The zoom range fits my needs, the bright aperture is great and the IQ should be higher than the other cameras you have listed. Right now, my travel cam is my Panasonic LX5 and it's great, but I see the X10 as beating it in many respects.
If a pocket camera is what you want, then the x10 will not be for you. If you need a big zoom range out to 200mm+, the look elsewhere. If that's not important, then yes, I would think it would meet your needs