Aimpoint scopes - 2 MOA or 4 MOA dot?

[texgunner]

I'm looking to get an Aimpoint red dot scope for my M4, and I have noticed they are available in two dot sizes, 2 MOA and 4 MOA. I would like opinions on which would be best for all round use such as target shooting, plinking, home defence and possible SHTF scenario.

Tex

 

[Tomac]

I prefer the 2moa dot as the 4 is too much for shooting at longer ranges (YMMV). If I want the dot to appear larger I just kick up the brightness. I use the CompM4 and am very happy w/it.
Tomac