first you have to ask your father what attracted him to the Bose system, i.e. size, design, WAF, easy of use???? Maybe sound quality is secondary to the aforementioned list. If he was about to buy the Bose system then maybe price is not a factor and all the things i listed mean more to him.
ask your father:
does speaker size matter
can he live with separate boxes or would he prefer a all in one unit
does design matter
ease of use should be a key factor for everyone but ask him if setup and operation can be a little more "involved"
does second zone mean anything to him
does RF control mean anything to him
does auto-calibration mean anything to him