I am new to the EX-1 but I did get one of the MxR cards from Australia and am using a 8 Gig SanDisk Extreme III SD Card (Purchased at Circuit City’s Blow Out). Happy to report no problems with this combination. Even shot some 720P 30 stuff overcranked to 60FPS.
John Mortensen
http://www.thinkatron.com
360-738-8882