You don't need to-you've got CD4 to meet your needs. I got Lightwave at LW 6-when I did a sidegrade from StrataStudioPro. I waffled over going with CD4 OR LW at that time.

LW I'll upgrade at some point- not watching the video-don't want to drool over something I can't eat! :-) LW10 has some nice improvements-were I employed I'd probably eat Top Ramen for a while and upgrade now. Then I'd go back to exporting my Poser scenes to render in LW10.

Quote - "Up until PoserPro2012 I did all of my rendering in LW. It is still far faster if I want global illumination, Radiosity (a more advanced form of IDL). I have 9.6.1"

I have a seat of  LW9.6 as well along with the External Kray render engine.
I rarely even open it these days but its still a powerful VFX& animation workhorse when you really learn is full capabilities.
I assume you seen the demo videos of Lightwave 11??
amazing!!!
but alas who can afford to keep up anymore.

Cheers

Cheers