Chris Brown

witch flashcard will work best on a Nintendo 3ds?

i hop i can get i 3ds for myself this holiday season and around a year ago i broke my old ds and sold my lot of 50 games,i also had a r4i gold ans the Rom compatibility SUCKED!,all homebrew and everything was fine but out of the 100 nds roms i had only 20 of them worked and out of those twenty 15 either crashed after awhile or had major graphical glitches,and i was wondering if there are any GOOD flash cards for 3ds that has perfect nds rom compatibility,i heard acekard and supercard were pretty good,and is there any cards that will still work after system updates,i want a 3ds but i dont want to buy back all of my old games when i could just download them!