I have a Lexar CF and three lexar SD cards with which I am very satisfied -- no troubles at all. I also have a PNY SD which seems fine (with considerably less usage, however). Some users have reported problems with Lexar SD cards not made in Japan, but I have no experience with these cards. My caution would be to stay away from Sandisk SD cards; I have never had one, but lots of users here and elsewhere have reported problems. See the long discussion in the Hardware Troubles Forum here
http://aximsite.com/boards/showthrea...&threadid=4031 for more about the Sandisk problems.