Aish v's McDonald

[HarveysFlyers#35]

With the likelihood of Georgiou now being upgraded to the senior list, i think you have to now lock him into the back line (which i'm sure everyone will).  My dilemma now is to whether select McDonald as a midfield rookie (i'm running with seven midfield rookies - Tyson/Polec/Michie/Ellis/Dunston/Crouch), or do my stick with my original plan of running with James Aish. 

The wraps coming out of the Lions about this young fella is huge - or do i take into consideration the M/D bonus that McDonald brings to the table...recent posts by some Nth Melbourne supporters having me worried that McDonald is a big vest candidate as well.

Would love some opinions on my midfield rookie dilemma...thanks in advance!!!!!