VO next purchase

So I’ve finally got 1000 points of Tyranids and am trying to focus on building Vanguard Onslaught, and I’m trying to come to a decision on what to get next. My current units are:
2 x Hyper Adapted Raveners
6 VRLs
Psychophage
10 Genestealers
Broodlord
Biovore
Lictor
Neurolictor

I’m not trying to be super optimal but want to lean melee as much as possible. Currently I’m thinking Winged Hive Tyrant, another box of Genestealers I run as 2x5, Deathleaper or Maleceptor. I’m also interested in Neurotyrant and 6 Zoanthropes and know they are popular, but with my budget I’d need to spread out that purchase and I’m not sure how immediately impactful just 3 Zoanthropes or just a Neurotyrant is.