Going to USA in a few months,going to buy girlfriend a ring.Probably going to cost between $3 and $4000.Would I be best bring that in dollars and pay commission or just put it on credit card.I've Permanent TSB Ice credit card and Visa debit,dont know which would be better to use.By the time I pay currency conversion fee,would it be more than paying commission?I know paying by card would be safer.Should I let bank know beforehand so they wont be suspicious about such a big transaction?Thanks