Well since I've had the X-H1 (a couple of weeks now), I've been testing the used 18-55 lens I purchased it with (from WEX), and I have to admit to being quite disappointed after all the hype I've read on here. I think I got a bad copy as whilst it's quite sharp at 18 mm (even from wide open), at 40-55 mm it's very soft on the right hand side. Even stopping down to F11 doesn't really bring it back to anywhere as good as the centre or left side. I've therefore contacted WEX to see if this can be returned.
In the meantime, I was looking around for a replacement last night, and dropped onto Park Cameras site and found a mint 16-55 F2.8 (albeit without box) for £569 which I thought was pretty good, but even better when I noticed they had a 10% off voucher for all used products. So I've therefore bagged it for £512 (which if it's as good as the description and as good a lens as people make out), could make it a real bargain. I know it will be much larger and heavier than the little 18-55, but when I ran a Pro Nikon DX set up some years ago, I mainly used the Nikon 17-55 F2.8 (that was 755 g) and even now with my Micro Four Thirds kit, with my EM1 MK II or Panasonic G9, I tend to use the Olympus 12-100 F4 (that weighs 561 g), so the 16-55 F2.8 weighs 655g which splits the two, so I'm hoping on the slightly larger X-H1 it won't feel too big ?