They're both gorgeous! I think the quilted is more classic, but the chevon is more edgy. You really can't go wrong! Obviously the quilted will never go out of style, but I don't think the chevron is much of a risk either!
Both are georgeous bags but between the two I think I would go for the classic black. I have my classic black in GHW and the chevron in blue. When I bought mine I had this in mind that I want a classic flap in my collection which I was to use for a lot many years ahead and which will always be in fashion. Then I bought my blue chevon in SHW later (actually this month) for my casual look. Love both the bags. Best of luck in deciding.