When I moved up to the 15 inch from the space grey 13 inch, I specifically went with the classic silver because I recall the chipping on my 13 inch.A lot of my colleagues got the Space Grey. Some look great, but others don't look so good, with bad enough visible scratches to justify a significant discount on resale IMO. In contrast, silvers with the same scratches don't look anywhere near as bad.
If you're afraid of scratches, get a skin. In fact, I got a skin for my silver 2017 MacBook. Mind you, for my silver 2009 MacBook Pro, the thing almost looks new, and I have not used a skin with it. If you really look closely there are scratches, but they are very hard to see otherwise. In contrast, some of those scratches on a Space Grey would look much more obvious.
I second the skin idea.