Oh, yeah, there's still no real substitute for K4. Baby Luna is too much of a baby, and the various child morphs for Dawn, LF, etc. have a preteen look. K4 covers the gap.

I still use mostly V4 and M4. There's just not enough support for newer figures yet.

There is a bunch of V4 and M4 stuff that's no longer available, that I would buy if I could. Pulled from the RMP back when they used to cull items that didn't sell enough, I assume. Sometimes there's add-ons for them still for sale, but the item you need to use them is no longer available.