I can't think of any wireless sticks off the top of my head other than 8Bitdo's offering. They're generally not legal at tournaments.
Personally, I like just about anything from Hori. I like their Fighting Edge stick a great deal. It doesn't seem to be in production anymore, unfortunately. I've since modified mine pretty extensively but I liked it a lot right out of the box.
I have a Qanba Obsidian that I use whenever I play games on my computer. Again, it's out of production but Qanba now offers the Obsidian 2.
They're two of my favorite sticks and I own a lot.