I have no idea wich one is the easyst to breed but here is someting about someone who had eggs from L10a but it's not really a breading article http://www.aquaforum.nl/ubb/ultimatebb.php/topic/11/989.html#000003 and this article you have already probably red it is about breeding the peckoltia ...

what do you think of breeding the peckoltia vittata ?
http://www.planetcatfish.com/shanesworl ... cle_id=257

those are some nice catfish