The only small negative with the compact series is that they only go to 3x.  As for which reticle to choose:

Dot = ultra fast aquisition of targets but lacks a precise aiming point. (Your supposed to impose your target on the 12 o'clock position of the dot, not cover it up.)

Triangle = very quick aquisition and the tip of the triangle allows for finer precision.

Crosshair = very precise but the finer crosshair isn't the best for fast aquisition shooting.