I did muse about shelling in the $100 for the fourth edition but luckily my son preempted me by creating the special edition himself. A pile of legos, some pen and paper, and you're ready to roll. To be sure, I drew the marines but he did a credible job on the genestealers and designed to ship itself. We both contributed sound effects and cries of "Avenge me brothers," and "my bolter is jammed!"
Lego Space Hulk is still plenty fun- we played with a mishmash of Death Angel and ios Space Hulk rules. Highly recommended and you end up saving $99.80!