Short of having a portable N64, what's the absolute best method you guys know of for an N64 emulator running on a mobile device?

I've been searching for so long to find a way to play N64 games on a portable device.

What about something like a 3DS XL? Something with built in controls would be pretty nice.

And obviously running other emulators would be essential as well.

I tried PSP; however, N64 is pretty much impossible to run on it.