I'm ok with just refactoring them as needed. 

BTW this is the list of computed properties: http://emberjs.com/api/classes/Ember.html
```
computed
computed.alias
computed.and
computed.any
computed.bool
computed.collect 
computed.defaultTo 
computed.empty 
computed.equal 
computed.filter 
computed.filterBy 
computed.gt 
computed.gte 
computed.intersect 
computed.lt 
computed.lte 
computed.map 
computed.mapBy 
computed.match 
computed.max 
computed.min 
computed.none 
computed.not 
computed.notEmpty 
computed.oneWay 
computed.or 
computed.readOnly 
computed.setDiff 
computed.sort 
computed.sum 
computed.union 
computed.uniq
```