3 fairly different scopes. The kahles 4x18 is nice but is a bit short in elevation,the premier is FFP which is not my prefence for a straight out hunting scope but looks very nice .The March 5 year warranty is because thats all japanese law will allow for a company of that size.March are top end scopes and I for one dont believe Deon optics will send you packing if you have a problem after the 5 years has ticked by.
If you want an iluminated reticle and FFP isnt an issue for you then the premier 3x15 light tac or hunter would be my first pick as march iluminated reticles are costly.Non iluminated then March leaps into the lead.