If you go for the Harris, get a "25" in the 1A2 series or S (swivel), but stay away from the "25C". The 25C is too long for most prone shooting unless you are 6'4" with orangutan arms. I find the 25 1A2 to be the most stable in the field, prone or sitting, though many find the swivel on the S series useful saying the legs take too long to adjust. I have never found the leg adjustment to be problematic.
As for the shooters ridge copy of the harris, what a POS; I had one given to me and it seems the legs do not open to the same place / angle and therefore make the legs uneven from the start. I have seen a couple of others that come with those 10/22 Charger pistols (they must be from shooters ridge) and they had the same problem.
Can't say I have had a good look at the Versa-pods.
Cheers.