When it comes to GMs I think it should be quality more than anything else. If you can only get two good GMs then that's better than half a dozen bad ones.
To a certain extent. The military challenge is pretty lame when all the enemy forces are controlled by 1 guy. Also, good or bad, they are prone to inactivity after some time. The more you got from the start, the less continuity takes a hit and the more enjoyable fighting them is. Also, I have a hard time to see how one could be "bad", or that most of the previous were "good".
No hard feelings towards them, though, I just feel it's organized extremely poorly.