W1 is pretty amazing in my Noctigon K1 and Acebeam L19. The most versatile IMO is probably the XHP70.2 (XHP70.3 throws farther but less lumen and flood), love it in my MK38 and will love it once they ship the X75. I have the SFT40 in MK38 and throws far, but prefer the XHP70.2 5000k. The most wow for me is probably the SBT90.2 in my K1, Lumintop GT94vn and Mateminco MT90vn plus Spec C.