My vote would be for the 3-peak all-season tires
You may also want to consider "performance winter" tires. These are still winter tires, but with better dry-road handling. Not quite as good in snow as regular winter tires, but better than any all-season, even 3-peak all-season. They might fare better in the warm than regular winter tires, even if they're not as good as an all-season in that regard.
Examples of performance winter tires in the size 235/55-17:
Falken Eurowinter HS449
Hankook icept evo2 W320
Nexen Winguard Sport
Pirelli Sottozero
Dunlop Winter Sport 4D
Continental ContiWinterContact TS830p
Kumho iZen RV KC15
Yokohama Wdrive
You may also want to consider "performance winter" tires. These are still winter tires, but with better dry-road handling. Not quite as good in snow as regular winter tires, but better than any all-season, even 3-peak all-season. They might fare better in the warm than regular winter tires, even if they're not as good as an all-season in that regard.
Examples of performance winter tires in the size 235/55-17:
Falken Eurowinter HS449
Hankook icept evo2 W320
Nexen Winguard Sport
Pirelli Sottozero
Dunlop Winter Sport 4D
Continental ContiWinterContact TS830p
Kumho iZen RV KC15
Yokohama Wdrive