Max and Logan, definitely.
Zack doesn't even trust Max enough to tell her the location of the others. And he still has a military outlook on life. That's the very attitude and perspective Max is trying to forget. She uses her training learned at Manicor (sp?) to stop bad guys, but not to be a perfect soldier. She just wants a normal life with friends and a family (X5s, of course) free of seizures.
Logan wants Max to be happy, and she clearly has a thing for him; otherwise, she wouldn't risk her life and limb in his behalf from time to time, and she would've left town with Zack and the others as soon as the location of the other X5s were compromised. She clearly does NOT want to do things Zack's way, but she has formed a bond with Logan.