well, as far as MAC goes, if you're looking for length and separation/not necessarily tons of fullness, I would def recommend Mascara X. Love this.
Otherwise, I love MAC fibre rich lash for fullness and length... but this one requires effort to avoid clumping. So, I guess my vote is for the mascara X. B/c I am a MAC whore. LOL
oh and I think an eyelash curler is essential for dramatic lashes. Love Shu Uemura's...I noticed since I purchased it years ago, it has become stupidly more expensive, but it is still worth it....