What's the best cart for a 16GB SDHC

I'm running out of space on my R4 (8gb sdhc)
I want to use a 16GB SDHC but I do not want a R4 cloneSo I need to know which one is better when using a 16GB and maybe a 32GB...DSTwo or Acekard
I know they both can use it but which one is faster, and have less issues with bigger sdhc
I've read the stats for both but I would like some advice from someone who acutally has hands on with with DSTwo or acekard and 16gb and up sdhcMy r4 wasn't able to run a 8gb class 2 that well...I had to get a class 6 sdhc.

i'm currently using a 32 GB card with my AK2i and it runs great! i don't own a DSTwo though....really want one....

thanks, I'll just get an acekard...I was leaning towards acekard anyways..but the DSTwo has the GBA emulator. .the acekard will do untill the 3DS comes out, and hopefully someone will make a cart for that..crossin my fingersthanks catz_102