http://www.amazon.com/Samsung-Class-Adapter-MB-MP64DA-AM/dp/B00IVPU7AO/ref=sr_1_5?ie=UTF8&qid=1463103030&sr=8-5&keywords=samsung+evo+sdcard
Anything faster is useless since the wiiu can't read that fast.
Hard to do a top3, you need to search for cards with fast random 4k read/write. I looked...