I was wrong before and I may be wrong again but I can't believe that he's going to pick Brooke. I thought that he had feelings for Gwen and Helene and decided that he was having stronger feelings for Helene and so he voted Gwen off.
Brooke had a swimsuit on in the hot tub. I could see the string on the top, it was just covered. He told Gwen he was falling in love with one of the girls, I can not believe that it was Brooke. I thought that his body language was all off for her and he felt uncomfortable. He just wasn't asking the right questions, but you never know, it's TV and not reality.
IMHO Brooke's family was just too scary and she's just too needy. Helene is so confident and sure of herself. She's mature and smart and Aaron seems to be able to talk to her better than Brooke.
But hey, I thought that he was going to pick Gwen and I thought that Helene didn't stand a chance, so he'll probable pick Brooke.