Va bene. I repeated: Vabbe', vabbe' means at the same time: a) I agree b) don't tell me anymore or a) don't tell me, I will do in my way. Ok for family members (teenagers towards parents) and maybe friends. Example: Mummy: tesoro, mettiti il cappotto, oggi fa freddo. Son: vabbe', vabbe', me lo hai gia' detto ... Marco: ti va bene la corriera delle 7:00 ? Anna: vabbe', se non c'e altro dopo (vaga aria di rassegnazione) I would say that 'va bene' sounds much better.