Best flashcart?

Hi I recently bought a Nintendo ds (original one) and I'm planning on buying a flashcart for the ds. I would like to know which will work best and work with most games if not all games, specially newer ones. Also if any of them bring like something to play gba roms on the ds would be nice too.Also would like a cheaper flashcart.

Read through some of the other topics. All the info is there.