Here's my predictions:
Zach will pick Kristin to be his roommate because he caught Amy throwing herself at Keith or something.
Dave will pick Charla to be his roomate because she is his security blanket.
Alex will pick Kristin to be his roommate because he does not like rooming with Amy.
Beau will pick Tara to be his roommate even though everyone thinks he'll select Toni.
Scott will pick Charla after having an arguement with Toni which caused him to look bad.
This is how the ties are broken. Kristin picks Alex over Zach. Charla chooses Dave over Scott because the two are allies again.
Zach then chooses Toni and Scott chooses Amy.
Keith then decides to chooses Tara because he wants to ally himself with Tara because they are both new.
BEAU GOES HOME!!!