What are the best banks in Barbados that offer current (chequing) accounts with the highest possible interest on balances, and how do leading banks such as Scotiabank, Republic Bank, First Citizens Bank, and CIBC Caribbean compare in terms of features and account benefits? Additionally, given that most current accounts in Barbados typically offer little to no interest and are designed mainly for transactions, what key factors such as fees, minimum balance requirements, accessibility, and digital banking services should customers consider when choosing the best current account?