Irish and Regina's two fights are my favourites from ECC. The first is very even till the closing seconds, when one girl scores a submission to win it. The second is also even till about halfway through, then one takes over and begins to dominate. It's a very intense fight emotionally, because of the rivalry from their first meeting, which is why I love it so much. The loser is teary eyed and dejected at the end.
Other very even fights, with good aggression and emotion, are both of Irish's fights with Jane, and also Irish vs Michelle 1 & 2. Tori vs Molly, Kristin vs Marissa, and Lexie vs Johanna also come to mind here.
Lexie vs Johanna would also be on my list of most ferocious ECC fights, especially for the fierce face slapping. Along with Irish vs Blair, Inara vs Jesse - very hard body punching in that one - and Sasha vs Jean.
Hope that helps.