Hi, guys. Newbie here... I'm looking to start on a project involving the Altec Duplex drivers and I've narrowed down the choices to the 604E and 605... if you'd weigh in with pros & cons of each driver (i.e. I've heard that the 604E's bass is more substantial but 605s have better midrange?)

Thank you very much!

P.S. - is it pretty much the consensus that the Mastering Lab crossover is the best available for the 604E? thanks!