New Frog World:
Dark Eldar Tantalus:
£85 & rules in IA Apoc 2.
Land Raider Proteus / Mk1:
£80...maybe with new rules (no assault, some bonus perhaps)?
I like the DE skimmer, it'd make a great centrepiece for an Autarch to ride around on.
The Land Raider I'm not so sure about - I'll need to see how it scales up first.