At this point, I am looking at getting an Acekard myself, I have an M3i Zero, and I would have to advise against it. The updates have been taking forever, and lately there's been games listed as "fixed" that still don't work. I don't know much about the AKAIO FW, but I assume the updates are often. I don't know anything about the DSTWO yet...
Signature
White DSi Silver DSL AK2i - AKAIO - 8gn Sandisk M3i Zero - M3 Sakura Orig. white R4 - Wood R4