Howdy,
When I was looking for guns for my son, I looked at the Cimarron Lightning, but also found a Thunderer and compared the two. There is not much practical difference in size and the Thunderer takes almost all the regular Model P parts, so that was a real plus for me.
Good luck getting here started.. I think just having a set of guns that is their very own helps get folks enthused.
Adios,