What's the best R4 card for a 3DS?

I have been looking for information on this but all I could find is old articles which were like 3 months old. I want one that won't mess anything up, isn't primarily based on WiFi (because I don't have it), supports 3D (hopefully by now it's possible? I don't know). Someone please help, I'm new to the DS area, I'm a PSP guy (right now). So far I see an Sc DSTWO and R4i-SDHC as possible cantidates but I don't know about the R4i-SDHC because it seems WiFi only and. PLEASE REMEMBER IT'S A 3DS.