Is Quest bridge Regular Decision worth it? Applying to NU, USC,Brown,..

<p>So I am a finalist for Quest Bridge but chose not to rank any college-something who I now regret. I chose not to as I am also a finalist for Posse Scholarship. But now I feel like not doing Posse and want to apply to QB partner schools, as I feel if QB sees potential in me ti attend such prestigious schools then why not give it a shot? Does Regular decision with QB give me a major advantage? I plan on applying to Northwestern, Brown, University Of southern California, Emory, Stanford, pomona. What looks like a good chance among these schools?
Stats:
ACT 25
GPA 4.46; 3.8
Rank 9/384
8 AP Classes; AP Scholar with distinction Award
Policy debate team captain, math team, cross country</p>