the transferee is a "holder in due course" and can enforce the instrument "without" being subject to defenses which the maker of the instrument would be able to assert against the original payee, except for certain "real defenses". These real defenses include (1) forgery of the instrument; (2) fraud as to the nature of the instrument being signed; (3) alteration of the instrument; (4) incapacity of the signer to contract; (5) infancy of the signer; (6) duress; (7) discharge in bankruptcy; and, (8) the running of a statute of limitations as to the validity of the instrument.