It's an honour to see Pat Brown from Synaudcon (www.synaudcon.com) using the OpenDRC + rephase + REW for a comprehensive review of the influence of FIR filters! His review is available on Prosoundweb.com and goes through a real life scenario of the advantage/limitations of FIR along with speaker design. A must read!

For more info on Synaudcon and the great learning/training sessions, make sure to check out their website.