Yes, interesting race... I think the main thing to remember for this race is, most of these runners are trying to win in the hope they may attract a penalty, and get into the Melbourne Cup. But since no horse has won the Geelong Cup, and gone on to win the Mel Cup, I doubt a penalty will be given. Still, no harm in trying, so Maguire and Cyclades should make the field (MelCup), and I would think would be running for fitness. The desperates to win the race are Media Puzzle (51), Cavallo Bruno (49.5), Firetaine (49.5), Forlorna (49), National Treasure (49), and Le Destina (49). I thought one of the best chances probably wont start in the race, Le Destina, so I recon:

National Treasure
Media Puzzle
Forlorna