I usually prefer silver on Fuji. (I am going to be very angry if the Pro2 is only made in black, again.) When the first images of theX-T10 came out, it was the first body which I thought looked cheap and bad in silver and better in black. When I went to pick my X-T10 up, I got to make my choice in person and I went for silver. It looks just as good in person as silver does on every other Fuji. I don't know why the promo pictures all make the silver X-T10 look tacky—maybe they shot it with a polariser on—but ignore them. If you like silver on other Fuji's, you'll like the silver X-T10. Of course, if you like black on other Fujis, you'll prefer black on the X-T10.
The Graphite SIlver X-T1 isn't really relevant because that's a different finish method and does look different. It's more sparkly and generally a more genuine metallic finish, and a tone darker. The silver used on other Fujis, including the X-T10, is brighter and smoother.
As for the 18-135, it's a very 'eh' lens. If you detest changing lenses and you have to cover absolutely everything, it's your only choice. If you simply want to cover most things, get the 18-55 instead, it's a much better optic. If you want the best optics and want to cover a good range, go with primes. The cashback offer is good for the 18-135, but it's even better if you buy two or more prime lenses: £75 back for the first lens, £150 back for every additional lens after that. Three lenses gets you £375 back, which is pretty much the cost of the 35mm f/1.4 lens; buy two other primes, get the 35 for free, effectively. The other benefit to primes or the 18-55 is they don't dwarf the X-T10 as much. Do not underestimate how small and light the X-T10 is, and how huge and unwieldy that makes larger lenses feel. The 18-135 is significantly larger than the X-T10. The 18-55 is smaller than the 18-135 and a lot lighter, and is in fact lighter than the X-T1. The 56mm, 16mm and 90mm primes are all larger/heavier than the X-T10, but every other prime is smaller/lighter and balances well.
It's theoretically about the X-T1 but the responses also apply to the X-T10 (which has the materials/colors of the X100x/X-Ex line where silver is the "true" color and black is "painted on" rather than X-T1 where black is the underlying material and GS is "painted on")
