Group One winner Sound Proposition is on the trail of a Queensland winter carnival feature.

"The owners are keen to have a crack at the Doomben Cup first-up," said Lance O'Sullivan, who trains in partnership with Andrew Scott.

"It's probably the toughest one, but if for any reason he didn't measure up then he can always go back to handicaps."

The Gr.1 Doomben Cup will be run under weight-for-age conditions over 2000 metres on May 20.

Sound Proposition finished fifth last time out in the Gr.2 Easter Stakes, a race he won 12 months ago when it carried Group One status.

"It was a very good run and he carried two kilos more than anything that finished in front of him," O'Sullivan said.

The Savabeel gelding had previously run third in the Gr.1 New Zealand Stakes behind Lizzie L'Amour and Benzini.

"Through nobody's fault, he was going backwards between the 800 and 600 when he should have been going forwards so he could have made it interesting with a bit more luck," O'Sullivan said.

"He's maturing now, he's always been a very weak racehorse."

Testament to Sound Proposition's talent was his third placing in the Gr.1 New Zealand Derby behind Mongolian Khan and Volkstok'n'barrell.

Meanwhile, two of the stable's other leading lights this season are enjoying time out.

The Gr.1 Sistema Stakes winner Summer Passage came home to the paddock after his runner-up finish in the Gr.1 Sires' Produce Stakes at Randwick and Charles Road has also been turned out.

"He's spelling, but he won't be out for too long and we'll have him back to get ready for Melbourne in the spring," O'Sullivan said.

Charles Road won the Gr.3 Manawatu Classic last month before he finished second in the Gr.2 Championship Stakes at Ellerslie.