acekard 2, Edge, SCDS1, choose whatever one is easiest cheapest, they are all cheap and work well for the average pirate.
the DSTT, whilst being the cheapest, isn't the most reliable, and considering all the above cost less than a single DS game any way the savings just are not worth the potential pain.
(the isn't a rule against putting duplicate posts in every "what flashcard do i buy" topic is the?)