"Types" or brands/logos don't mean very much. You can try to search ecstasydata.org or pillreports.com but it all comes down to the integrity of your dealer and his suppliers.
Ecstasy is great, but there are some things you should know before trying it.
If you have the time you should probably read the official Ecstasy guide: http://thedea.org/usersguide.html

or at least get the essentials here: http://thedea.org/letsroll.html