Best one...learn to shoot the irons while saving up for the EoTech or Aimpoint
Don't waste $ on "clone" aimpoints, eotechs, ect. Some good deals on used Aimpoints and Eo's can be had on the Equipment Exchange on ar15.com
edit to add: I have a N battery EoTech on one of my carbines and an Aimpoint on another.
Another carbine has the SPOT MkIII red dot on it. The SPOT would be as "cheap" as I'd go.
pic looks good so far but I could do without the laser engraving