Class 6 card for R4

I upgraded my 4gb sdhc on my R4 to a 8gb sdhc. it's a walmart sandisk brand
but now it kinda slow in loading gamesanyone knows if I got a class 6 8gb sdhc, would it speed up the loading??Or is it the card R4 that is slow??any help would be appreciated.
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Also what is better and easier to use for the DSi XLR4 or acekard ?? and what version??

Acekard is more supported then the R4As for the class questions a class 4 should handle most things. Pretty much anything over a class 2 will work with no problems with class 6 being the fastest but a c6 is really overkill.