Nitro wing, the 450 is rated for 18 amps max (could even be 16, I have to recheck.) A 20 amp esc is more than enough, 30 amps is an overkill. The Park 480 generally runs of ESC of that size. The 370 will run of a 10 amp speedy, the 400 and a 15 amp speedy would be ideal ( the esc wouldn't even break a sweat if true to its rating.)