This would be the alternative to the Myo XP: Fenix HP10
Same price but key differences are:
Myo XP {3xAA battery pack}: 150 lumens (Boost mode), 85 lumens (maximum level).
Fenix HP10 {4XAA battery pack}: 225 lumens (Boost mode), 120 lumens (maximum level).
I've never used a Myo XP, so can't comment. Basically, if you want super blinding bright, the Fenix is brighter than the Myo XP. The Fenix is a bit heavier tho with the 4xAA battery pack. For MTB, I take the straps off and zip tie the lamp and battery pack to my cycle helmet. The lamp is on a pivot, so you can adjust it to the required angle.