Bank Account to default to the Currency of the Supplier when entering a Supplier Payment Merged

If you highlight a USD Supplier account in the PL List View and then choose Payment the Bank Account is set to the systems Default Bank Account. It would be useful if this defaulted to the Bank Account which is the same currency as the Supplier. Or if there was an additional field on the PL Account to select default Cash Book account to pay from, this would be useful.