Hi guys! Out of the 4 coils available for the Falcon tank by Horizon Tech, which is the best one in your opinion? The M1, F1, F2 or F3? I vape for flavour, I'm not bothered about clouds. And I want the best flavour combined with the longest lasting coil. Which coil is best for the Falcon? Also, can anyone tell me where to find authentic genuine Falcon coils to buy online? Thanks!