Which is Betterr?????

I am planning to buy a Dsi therefore i would like peoples opinions on which is the better purchase TTDSI or ACEKARDI have been using R4 up until nowp.s Will the 2 cards i have specified run SNES roms?Thanks for everyones help in advance and if anyone could recommend a place where i could purchase these cards easily living in the UK and with reputable websites that would be an added bonus.

theres already a few threads that have your answer,...use the search bar thingy to find them.