I second the Sd.Kfz. 221/222. The Hulls of the 221, 222 and 223 are almost identical, except the front fenders & the stowage, but the later seem to vary from vehicle to vehicle. Maybe there is even enough room on a sprue to squeeze in a 2.8cm Panzerbüchse 41 for the 221.
While i'd love to see a late war 234/1 & 234/2 as well, i doubt the market will be that good with the Warlord/Italeri 234/2 on the horizon. Not sure about the 234/3 & 234/4 i think they are to rare (even though cool looking) to justify a plastik kit.
edit typos