For those prices, I doubt that they can get away with plastic buttons, especially if their competition still use MOP. It's been a while since I've bought a Borelli, the way the sleeves are set in make me afraid to launder them, the collar is nice. Recently I was told that Robert Jones will start carrying them last time I was in the store.
Last I heard they have three cuts, reg, slim and don't breathe out. My one Attolini shirt is fantastic and Brioni makes a very nice shirt. These days I buy reg Zegna on sale, availability is good and prices are okay. Haven't had a T&A shirt since they closed their Toronto store many years ago, but on the whole Hilditch and N&L shirts are nearly as nice as Italian ones. Anybody have any experience with Emma Willis? I hear good things about her shirts, might be worth a try.
Can't really comment on my local bespoke makers, they have good reps, but I found the shirts lacking when I saw them on a colleague.