Femto and Void are tempting. I own a few figmas but my biggest gripes with them were their size, exposed joints, and the fact that I couldn't pose them to save my life. These are also quite a bit more than what I'm used to paying for figmas.
On the plus side, both femto and void don't really have to be posed and you can't see either of their joints anyway. Just drop femto in his egg, and voids most iconic pose is with has hand stretched, so no posing here. Void is pretty damn big as well, and while femto is small, AoW rendition of that scene is equally small and 6x the price.
I'm seriously considering getting them, but idk about slan. I already have guts and slan which is nicer, and I could care less for Conrad and ubik as of now. Still, it's hard to imagine paying $300 for figmas. That said, I don't think we'll be getting a nicer void anytime soon, and the only other femto figure I like is that max factory statue which I haven't heard any news on in like a year.