For class and speed, the Peter Snowden stable has several two-year-olds ranked more highly than Saturday's Flemington winner Montsegur.

But Snowden and the Darley operation have none that are tougher or more resilient.

"If we turned her out and gave her a rest she'd do too well," said assistant trainer Paul Snowden.

Montsegur, the $2.50 favourite, had the fifth start of her first preparation in the Thoroughbred Breeders Stakes (1200m), turning in what may have been her career-best performance.

Coming off the back of an unplaced run in the Blue Diamond, Montsegur overpowered Bulbula ($5) in the final 200m to score by a half length.

Diva Dee ($7) made good ground to finish third, a further length away.

Snowden said Montsegur would now join a group of youngsters heading for next month's Golden Slipper, although she isn't necessarily a likely contender.

"She's one of six or eight heading in the same direction," he said.

"We'll just let the dust settle on this win and look at the situation later in the week."

Montsegur's previous four runs had all been at Caulfield, the latest in the Blue Diamond two weeks ago.

But she had no trouble with the Flemington straight track or her opposition.

"She got behind a couple which I didn't think would happen," Snowden said.

"But she's as tough as they come and she's had the experience.

Montsegur also registered the first stakes win for her stallion, the Epsom Derby winner New Approach.