Some good points, I agree too dark would hide the design and maybe make look smaller.
Thing is, I like the standard diamond cut finish look, but after 5 years and lots of white worm they look really quite bad. if I go diamond cut again they will within a 18 months - 2 years start to suffer white worm again, its just the nature of diamond cut wheels.
Maybe a lighter colour would be best, the tungsten colour is like a mid grey, half way between silver and the anthracite
Looks like I have some thinking to do!
keep the guidance coming please!