Which cart for DSi is the best?

I want to buy a DSi but I’m not really sure which flash cart I should get. I would think about either Acekard 2i or m3i Zero.

M3 lets you play GBA ROMS aswell but all I want is a good flash cart, even if I have to sacrifice playing GBA, I would purchase a good cart because sometimes people give reports on bad carts, for example: R4DS cart, they say it is dead.

Please inform me and tell me which will be the best suited cart for my DSi.