Yeah get the 6-36x as the 2x difference at the bottom won't make any difference as you don't by a 25x or 36x scope to use the lowest power a majority of the time or even any time except to maybe get a wider FOV to find a target. With the reticle design as mentioned you can see the reticle pretty good and with the illumination on it's like a red dot almost as you have a mil sized square box aiming point. Play with using the illumination as it does help at time when getting on target to take a quick shot.
I might have posted this before but in case you didn't see it it's a size comparison between the two. 6-36 on left and 4-25 on right. Both have sunshades on them.
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