Yeah I'm big on Cabrera. Assuming the Twins don't get into a deep sell-off he's probably my favorite individual SP available. I'd be willing to move guys for him that I wouldn't elsewhere.
Alcantara's been talked about extensively. I tend to think it's probably best to stay away, but at the same time I would absolutely buy it if the Cubs' pitching development guys felt he's an easy fix. I'm largely just shrugging my shoulders and appealing to authority here.
Otherwise I don't think I have much interest. Henriquez looks *really* good, but I wouldn't want to pay the premium his team control will require. Plus, the Cubs have Palencia and Hodge, plus potentially Brown or Horton as high octane young arms that will potentially be part of that playoff leverage innings mix. I'd probably prioritize an arm that I have zero reservations about translating his ability into high leverage spots.