yes orcs do have the blood fury but the WITF would top that off by far. i only have a 48 UD lock right now but i own orc locks just because of that verrry sweet racial.
i might just choose orc if going completly demo spec since youll be really depending on pet. but i go afflic so i need to be active 100% of the time.
and the canabalism is alwys useful, even in pvp