I got the metallic micro cannage in oynx just over a week ago and tbh it feels sturdy, but I don't know tbh. All I do know is that it was so beautiful it was worth the risk, I don't regret it one bit. I have a metallic Chanel and it's aged very well, I have travelled and used the bag constantly for over a year.
Personally I think when your spending that sort of money on a bag it should be on something that pulls your heart strings. Spending 2k on a bag is never a pratacle decision . Since I purchased my staples I decided that now I would only purchase bags that wow me.
I was also looking at the grey bag myself when I visited the store, then the SA showed me the micro cannage and I changed my mind immediately.