If you're on a tight budget, I recommend the Rode Video Micro. The cheap one. It works great. Having a stereo mic is nice, but you're only going to notice it if you're listening on a good sound system and especially with headphones.
However, it's not so much the microphone as how your camera handles the sound. If the camera's converters and preamps are bad, the sound will be horrible. And above all, if your camera has a sound limiter, it doesn't matter which microphone you use, the skate will sound like a fart.
For example, some DC and Sk8mafia filmers use cameras with limiters and the sound is simply horrible.
https://youtu.be/0P1fm6pDAkc?t=339 If it already sounds bad in RAW, imagine with music.